Belize
5/21
Photo: A beach in Placencia, Belize. (photo via iStock / Getty Images Plus / Simon Dannhauer)
U.S. citizens can also vacation in Belize right now. However, they'll be required to submit a negative COVID-19 test taken no more than 72 hours prior to departure and download the Belize Health application on their mobile device to complete the necessary health forms. If their test result is older than three days, travelers can take a rapid test at the airport at a cost of $50 per passenger.