Cuba leases Guantánamo Bay to the United States "in perpetuity".

Cuba, officially the Republic of Cuba, is an island country in the Caribbean, comprising the island of Cuba, Isla de la Juventud, and 4,195 islands, islets and cays surrounding the main island. It is located where the northern Caribbean Sea, Gulf of Mexico, and Atlantic Ocean meet. Cuba is located east of the Yucatán Peninsula (Mexico), south of both Florida and the Bahamas, west of Hispaniola, and north of Jamaica and the Cayman Islands. Havana is the largest city and capital. Cuba is the third-most populous country in the Caribbean after Haiti and the Dominican Republic, with about 10 million inhabitants. It is the largest country in the Caribbean by area.

Guantanamo Bay Naval Base, officially known as Naval Station Guantanamo Bay or NSGB, is a United States military base located on 45 square miles (117 km²) of land and water on the shore of Guantánamo Bay at the southeastern end of Cuba. It has been leased from Cuba to the U.S., without expiry, since 1903 as a coaling station and naval base. It is the oldest overseas American naval base. Since 1974, the U.S. has paid the Cuban government an annual sum equivalent to $4,085 in 1934 dollars to lease the bay. The lease was previously $2,000 per year until 1934, when it was set to match the value of gold in dollars.