Dominica, known as the “Nature Island of the Caribbean,” is a haven for eco-tourists and adventure seekers. Nestled between the French islands of Guadeloupe and Martinique, this lush island boasts a remarkable landscape of volcanic mountains, dense rainforests, and stunning waterfalls. Dominica’s most iconic natural wonder is the Boiling Lake, the second-largest hot spring in the world.

Doubtful Fjord (Doubtful Sound) is a large fjord in southwestern New Zealand, in the same region as the smaller but better known Milford Sound. It is home to an unusually large population of bottlenose dolphins, as well as a variety of birds, fur seals, penguins, and often even humpback whales.

Martha’s Vineyard, located just seven miles off the coast of Cape Cod, feels like a world apart. This island has long attracted artists, presidents, and vacationers seeking something quieter than the mainland. With six distinct towns, each with its own style, visitors can explore everything from the stately streets of Edgartown, once a prosperous whaling port, to the laid-back vibe of Chilmark, where stone walls and sheep pastures stretch to the sea.

Isabella Island is the largest of the Galapagos islands, on the western end of the archipelago. Shaped like a seahorse when viewed from above, Isabella is home to more wild tortoises than any other island, as well as a wide variety of other animal, bird and marine life.

Guadeloupe's major center is Pointe-à-Pitre, a conglomeration of old and new buildings clustered around the bustling harborside market. Pointe-a-Pitre is Gudeloupe's most popular city--explore the beaches of Grand-Terre and the French fort ruins and volcanic mountaintop of Basse-Terre.