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.

Bar Harbor should be any traveler's Maine priority! Drink in a view of the Atlantic Ocean from the town pier, and be sure to get some lobster at one of the excellent local restaurants. Bar Harbor, a Mount Desert Island town, is also the portal to the rugged, recreational paradise Acadia National Park, where birding, whale-watching and kayaking is the order of the day. The park's Cadillac Mountain is the highest point on America's East Coast.

Les Andelys, a picturesque town on the banks of the Seine in Normandy, France, is best known for its dramatic setting beneath the ruins of Château Gaillard. This medieval fortress, built in the 12th century by Richard the Lionheart, stands high on a chalk cliff overlooking the river, a reminder of the region’s turbulent past during the wars between England and France.

Hidden in the northern region of Costa Rica, the Celeste River (Río Celeste) winds through Tenorio Volcano National Park with a color so vivid it seems unreal. The river’s striking turquoise hue is caused by a natural chemical reaction between two mineral-rich streams, Quebrada Agria and Río Buena Vista, which merge at a point known as "El Teñidero." This one-of-a-kind phenomenon creates the illusion that the water has been dyed blue, even though no pigments are present.

Located in Greece's Lesser Cyclades, Naxos is an island in the South Aegean Sea and popular for its spectacular beaches. A favorite tourist destination, Naxos is home to a variety of ancient ruins, including the Temple of Apollo - Grotta, the Temple of Demeter, and Apano Kastro.