Lake Toba is another of the island's spectacular sights - a remarkable volcanic crater set in the middle of northern Sumatra, 176km from Medan. The lake is huge (the largest in South-East Asia), occupying the caldera of a giant volcano that collapsed on itself after a massive eruption some 100,000 years ago.

Mamora Bay, tucked into Antigua’s southern coastline, is a serene crescent-shaped bay framed by gentle hills and swaying palms. Known for its calm, sheltered waters, the bay offers a tranquil setting that contrasts with the island’s more rugged Atlantic side.

A tributary of the Amazon, the Napo River (Río Napo) originates in the east Andes mountains. It flows east through Ecuador, then southeast into Peru, where it joins the larger river roughly 50 miles downstream from Iquitos.

Situated at the foot of Mont Collon, the small village of Arolla is a popular starting point for summer mountain hikes as well as a common stop on the Chamonix-Zermatt Haute Route expeditions. In the winter, it's a small ski resort with five lifts and guaranteed snow thanks to the elevation.

East of Anchorage and Chugach State Park, College Fjord offers a glimpse into some of Alaska's most beautiful natural landscapes. Located in Prince William Sound, College Fjord is filled with stunning glaciers and is a popular site for Alaskan cruises.