Fitzroy Island sits off the coast from Cairns in Queensland, Australia, rising from the Coral Sea with rainforest and beaches that draw visitors year-round. A short, scenic ferry ride from Cairns’ marlin marina brings visitors to this tropical island, part of the Fitzroy Island National Park where rainforest meets reef.

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.

One of the major rivers of the Iberian Peninsula, the Douro in north-central Spain and Portugal just might be the world's most beautiful wine region. Most of the river on the Spanish side isn't navigable, so river cruises generally travel roundtrip from Porto, on the coast of the Atlantic.

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.

The Volga River is an emblematic waterway that meanders through the heart of Russia, offering an exceptional journey through the country’s rich cultural and historical tapestry. As Europe’s longest river, stretching approximately 3,530 kilometers (2,194 miles), the Volga flows from the Valdai Hills to the Caspian Sea, weaving through major cities such as Tver, Nizhny Novgorod, and Volgograd.