Editor's Note — CNN Travel updates this article periodically. It was last updated in its entirety on May 30. Entries on France, Jordan and Spain were added on June 7. Entries on Denmark, Israel and Romania were added June 12.
(CNN) — US passport holders have more international travel options now than at any point during the Covid-19 pandemic. Total US cases are nearing the 33.4 million mark since the pandemic started, but the rate has been slowing down a lot recently. The United States is one of the world leaders in vaccination rates and has been leading among nations with a population over 100 million. In the end, it's up to you to decide whether travel to international destinations is a good idea. The health risks are obvious if you're not fully vaccinated. Variants of the virus have emerged. Nations might change their rules at any time. You may have to adhere to strict curfews and mask mandates. Violations could involve big fines and even jail time. If you want expert input into your decision, the US State Department and the US Centers for Disease Control and Prevention provide Covid-19 risk assessments by country. Both agencies rate many of the countries open to US travelers at Level 4, the highest risk for Covid-19. Also, remember that all air passengers 2 and older must show proof of a negative Covid-19 test that's no more than three days old to enter the United States. What follows is an alphabetical list of countries and territories where it's still possible for US passport holders to go for a vacation.
Click the links we've provided for very important details on presenting negative results from Covid-19 tests to enter (including time limits, types of tests allowed and additional tests upon arrival), quarantines (if any), possible exemptions for the fully vaccinated, health insurance requirements, curfews, lockdowns and more. People testing positive for Covid-19 upon arrival or while visiting can expect to go into quarantine.
Albania
Blessed with a gorgeous Adriatic Sea coastline, this southeastern European country has no test requirements or quarantine. Details and updates: US Embassy. Anguilla
US visitors will once again have access to the tropical waters of Anguilla.
Courtesy Belmond Cap Juluca
Antigua and Barbuda
Armenia
Aruba
Scroll down to the Dutch Caribbean entry below for information on Aruba and other islands in this group.
The Bahamas
Bangladesh
This populous South Asian nation offers beaches, interesting architecture and cultural experiences. Testing and quarantine requirements are in place. Details and updates: US Embassy. Barbados
Why do people come to Barbados? For starters, places such as Bottom Bay.
istockphoto
Belize
English is spoken in this Central American nation filled with wildlife spotting opportunities and stunning barrier reefs. Testing required; fully vaccinated exempt. No quarantine in place. Details and updates: US Embassy | Belize Tourism Board. Bermuda
Bolivia
This landlocked South American country offers surreal landscapes from Andean to jungle. Testing and quarantine requirements in place. Details and updates: US Embassy. Bosnia and Herzegovina
Bosnia and Herzegovina features cosmopolitan Sarajevo and gorgeous lakes. Testing required; quarantine is not. Details and updates: US Embassy | Bosnia Border Police Botswana
The annual flooding of the Okavango Delta is one Africa's most impressive natural wonders.
Joe Yogerst/CNN
This southern African nation is famed for its wildlife in the Okavango Delta and elsewhere. Testing and quarantine requirements are in place. Details and updates: US Embassy. Brazil
South America's largest country has the lure of Rio's party atmosphere and the Amazon River's mystique. It also has a very high daily number of Covid-19 cases. Testing required; quarantines are not. Details and updates: US Embassy | health declaration British Virgin Islands
Bulgaria
Historic towns and natural landscapes are Bulgaria's calling cards. Testing required; exemptions for fully vaccinated or recovered from Covid-19 infection. No quarantine. Details and updates: US Embassy Colombia
Downtown Medellin is a great place to take a stroll and soak up urban Colombian atmosphere.
Shutterstock
Costa Rica
Côte d'Ivoire (Ivory Coast)
Côte d'Ivoire is a popular destination for people wanting to enjoy West African culture and food. Testing required; quarantine encouraged but not required. Details and updates: US Embassy | Travel declaration and fee Croatia
Croatia, the jewel of the Adriatic, is once again open to US leisure travelers. Testing required to enter; exemptions for the fully vaccinated or recovered from Covid-19 infection. No standard quarantine in place. Details and updates: US Embassy | Croatia official entry form Cyprus
Both parts of this politically divided Mediterranean island are open to US tourists. The Republic of Cyprus and the northern third of the island administered by Turkish Cypriots (Turkish Republic of Northern Cyprus) each have their own rules of entry and testing. Details and updates: US Embassy in Nicosia | Visit Cyprus Denmark
Copenhagen, the capital city, is both quaint and sophisticated at the same time.
Odd Andersen/AFP/Getty Images
Dominica
Dominican Republic
Dubai
Scroll down to the United Arab Emirates entry below.
Dutch Caribbean islands
Find out the important details on these various Dutch islands in the Caribbean -- renowned for their hospitality and ocean life -- by clicking on the links:
Aloe is grown on this Caribbean island, and the Aruba Mule drink contains two ounces of fresh aloe vera juice.
Aruba Marriott Resort & Stellaris Casino
Ecuador
The animals of the Galapogos Islands, part of Ecuardor, fascinate scientists and tourists alike.
PABLO COZZAGLIO/AFP via Getty Images
This Andean country at the equator also owns the Galápagos Islands in the Pacific. Testing required; fully vaccinated exempted. If testing on arrival, quarantine awaiting results. Details and updates: US Embassy. Egypt
The Nile River nation has been attracting people to see its wonders for centuries. Testing required; quarantine is not. Details and updates: US Embassy. Ethiopia
Ethiopia has a unique and ancient culture and rugged, otherworldly landscapes. Testing and quarantine requirements are in place. Before you travel there, closely monitor news reports violence in the northern Tigray region (video) on the border with Eritrea. Details and updates: US Embassy. France
French Polynesia
French Polynesia is the idealized South Pacific destination. Testing required. Quarantine in place with exceptions for fully vaccinated travelers and those with proven immunity. Details and updates: Islands of Tahiti | FAQ document | Online ETIS form Georgia
Georgia is a geographical and cultural crossroads at the Caucasus Mountains. Testing required. Fully vaccinated people can enter with documentation. No general quarantine but with exceptions. Details and updates: US Embassy | Georgian Ministry of Foreign Affairs Ghana
This West African cultural jewel offers historical sites, delicious food and surfing. Testing require. No quarantine. Details and updates: US Embassy. Greece
Beautiful houses grace the port of Gytheio on the Peloponnese.
Shutterstock
Greece, with its many ancient ruins and islands, is now open to US travelers. Testing required; exception for the fully vaccinated. No quarantine. Details and updates: US Embassy | Passenger locator form. Grenada
Guatemala
This Central American country offers historical sites and stunning volcano landscapes. Testing required; exceptions for the fully vaccinated or those fully recovered from Covid-19. No quarantine. Details and updates: US Embassy | Online health pass Honduras
Honduras has epic diving off Roatan Island and other locations. Testing required. Conditional quarantine in some circumstances. Details and updates: US Embassy | Online precheck form Iceland
Geysers, glaciers, hot springs and waterfalls await in Iceland. You must be fully vaccinated or have proof of recovery from Covid-19 to enter. Testing and quarantine requirements in place as well. Details and updates: US Embassy | Iceland travel registration Ireland
Great Blasket Island is a hiker's paradise -- and the donkeys seem to like it, too.
Courtesy Tourism Ireland
Israel
NEW: From ancient Jerusalem to modern Tel Aviv, Israel now allows US tourists. Testing required. Quarantine in place for those not fully vaccinated or recovered from a case of Covid-19. You should keep a close watch on developments as you plan your trip regarding the recent conflict between Israel and Gaza. Details and updates: US Embassy | Israel Ministry of Health Italy
Jamaica
Jordan
A visit to Jordan's ancient city of Petra is a travel highlight not only of the Arab nation but of the entire world.
KHALIL MAZRAAWI/afp/AFP via Getty Images
NEW: Home to the amazing ruins of Petra, Dead Sea coastline and the dazzling landscape of the Wadi Rum, Jordan is open to US vacationers. Testing required; quarantine is not. Details and updates: US Embassy Kenya
Kenya is the definitive African safari destination, but Nairobi's urban beat attracts tourists too. Testing required; no quarantine. Details and updates: US Embassy | Trusted Travel initiative The Maldives
Malta
Americans who want their slice of Paradise Bay in Malta will first have to stay in a designated "safe corridor" country for two weeks.
Courtesy of the Malta Tourism Authority
Mexico
The land border between the US and Mexico remains closed through at least June 21, but US travelers can still fly there. No testing or quarantine requirements are in place. The US State Department lists numerous states to avoid because of crime. Details and updates: US Embassy. Montenegro
This Balkan nation is allowing US travelers. Testing under most circumstances required; exceptions for the fully vaccinated or the naturally immune because of previous Covid-19 illness. Details and updates: US Embassy | Institute of Public Health of Montenegro. Morocco
This North African favorite is open to specific US travelers only. Testing required, but no quarantines in place. Details and updates: US Embassy | Visit Morocco Namibia
US citizens can visit this southern African desert nation that appeals to adventure travelers. Testing required; quarantine required under some circumstance. Details and updates: US Embassy Nepal
US travelers can visit the landlocked Himalayan nation. Testing and quarantine requirements in place, regardless of vaccination status. Details and updates: US Embassy. Nicaragua
Home to historical sites such as Granada and tropical beaches, Nicaragua is open. Testing required; quarantines are not. Details and updates: US Embassy | Avianca Airlines. North Macedonia
North Macedonia has a part Balkan, part Mediterranean feel and its natural wonders are relatively unknown. No testing or quarantine required. Details and updates: US Embassy | TAV Macedonia. Panama
Soak up pirate history and a whole lot more in Portobelo.
AMillar
Peru
Romania
NEW: Romania offers mystique, wooded and mountainous landscapes and lots of history. No testing required. Quarantine in place with exceptions for fully vaccinated and those recovered from Covid-19. Details and updates: US Embassy | Romanian Embassy Rwanda
Rwanda's green hills and mountains are home to rare gorillas. Testing and quarantine requirements are in place. Details and updates: US Embassy | Visit Rwanda Senegal
Senegal, known for its West African beaches and music, welcomes US tourists. Testing is required; no quarantine in place. Details and updates: US Embassy. Serbia
Serbia features noteworthy architecture. City Hall is in the city of Subotica in the far north of the country, near the border with Hungary.
Dragan Bosnic
Serbia is steeped in historical sites and dramatic Eastern European scenery. Testing is required but quarantines are not. Details and updates: US Embassy. Seychelles
South Africa
With superb national parks, wineries and the allure of Cape Town, one of the most popular destinations in Africa is open. Testing is required; quarantine is not. Be aware some nations aren't allowing entry to tourists who have recently been to South Africa. Details and updates: US Embassy. South Korea
From busy Seoul to relaxing Jeju Island, South Korea is open. Testing and quarantine requirements are in place. Details and updates: US Embassy | Self-diagnosis app Spain
St. Kitts and Nevis
St. Lucia
Home of the steep and towering Pitons, waterfalls and volcanic beaches, the independent Caribbean nation of St. Lucia is open. Testing and quarantine requirements are in place. Details and updates: US Embassy | St. Lucia travel website St. Vincent and the Grenadines
Tanzania
Kilimanjaro's glaciers could become a thing of the past as average global temperatures rise.
Sergey Pesterev/Flickr Open/Getty Images/Flickr Open
A favorite for big-game safaris, Indian Ocean beaches and Mount Kilimanjaro, Tanzania is open. Testing required; quarantine is not. Details and updates: US Embassy | Health surveillance form Thailand
US passport holders can again visit this fascinating Southeast Asian destination famed for its beautiful beaches and spicy cuisine. Testing and quarantine requirements are in place. Details and updates: US Embassy | Royal Thai Embassy | Certificate of entry Tunisia
Tunisia offers ancient ruins, desert scenery and sunny Mediterranean beaches. Testing and quarantine requirements in place (starting June 1). Fully vaccinated visitors are exempt from both. Details and updates: US Embassy | Online questionnaire Turkey
From cosmopolitan Istanbul to rural coastal escapes, Turkey is open. Testing is required; quarantine is not. Passengers must fill out an entry form within the last 72 hours before travel and prepare to be checked for coronavirus symptoms. Details and updates: US Embassy | Form for entry Turks and Caicos
Uganda
Visitors with a respectful approach and careful eye might see a giant gorilla munching shoots and leaves.
Antonia Mortensen/CNN
This lush nation in Central Africa offers gorilla trekking, Nile River rafting and beautiful lakes. Testing required; quarantine is not. Details and updates: US Embassy. United Arab Emirates
The UAE, with its glittering towers and luxury resorts, has emerged as a major world destination in the 21st century. Testing required. Quarantine protocols depend on the emirate. Details and updates: US Embassy. United Kingdom
Leisure travel to the UK is highly discouraged but not banned. Testing and quarantine requirements are in place. Rules may vary between England, Scotland, Wales and Northern Ireland. Details and updates: US Embassy | UK government | Declaration form. Zambia
Known for Victoria Falls and wildlife, Zambia is allowing visitors. Testing and quarantine requirements are in place. Details and updates: US Embassy. Recently removed from the open list
The following countries had been allowing US citizens to enter but have closed again or were removed by CNN Travel for other reasons:
-- Cambodia: The US Embassy reports the Southeast Asian nation has stopped issuing tourist visas; you can still apply for business-linked visas.
-- Chile: It has closed its borders to almost all tourists through June 30.
-- Saba: The very extensive entry requirements currently exclude all but a few US citizens from this small Caribbean island.
-- Sri Lanka: No international flights allowed until June 1.
-- St. Barts: Temporarily closed to US citizens. Omitted countries
This is a curated list and not a full listing. CNN Travel has omitted certain open countries if they had very limited numbers of US travelers before the pandemic; have ongoing or recent armed conflicts, terrorism or rampant crime and unrest; or have entry requirements so extensive and complicated that they put the country out of reach of almost all US citizens. However, you can click here to check for the status and entry requirements of any country or territory in the world you wish to visit. 
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