Marathon, located near the center of the Florida Keys, is a vibrant island city known for its fishing, boating, and tropical charm. Nestled between Key Largo and Big Pine Key, Marathon is surrounded by clear waters, coral reefs, and sandy beaches, making it a prime destination for water-based recreation.

Tristan da Cunha is a remote volcanic island in the South Atlantic Ocean, forming part of a small archipelago along with Inaccessible Island and Nightingale Island. Known as the most isolated inhabited island in the world, it is accessible only by a week-long boat journey from South Africa.

Barranquilla sits near the mouth of the Magdalena River on Columbia's Caribbean side. It is a major seaport and a center of commerce, but everyone breaks loose for four days in February for one of the liveliest carnivals outside of Rio.

Nicaragua offers travelers a look into centuries of layered history set against striking natural backdrops. Visitors can tour the baroque-style Granada Cathedral, take a boat ride through Las Isletas (a chain of small, volcanic islands in Lake Nicaragua), or climb the bell tower of Iglesia La Merced for sweeping city views.

Formerly Mocamedes, this port in southwest Angola has become an important industrial center since a rail line was built in 1905 connecting it with the interior of Angola. In 1967 when iron ore was discovered in Dongo, an additional line was laid and the port was enlarged.