Photo: Caribbean, Grenadines, Britannia Bay, Mustique (Photo via Medioimages/Photodisc / Getty Images / Photodisc)
A private island set in St. Vincent and the Grenadines, Mustique features tranquil beaches and an eclectic array of activities, including sailing, snorkeling and scuba diving.
Requirements: A PCR test is required five days prior to arrival. A second test is required upon entry, with no quarantine if results are negative. Travelers are required to spend five nights on the island before traveling internationally.