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.

Argentina shares half of this island territory in the South Atlantic Ocean with Chile. It's a place of oil derricks, sheep, glaciers, wind and waterways. Ushuaia and Río Grande are the two main towns; awesome scenery, wild walks and fishing are the island's main attractions. Argentina's only coastal national park comprises rivers, lakes, forests and glaciers, with great trekking and wildlife-spotting opportunities.

Dubrovnik, often hailed as the "Pearl of the Adriatic," is a city where history and stunning natural beauty converge. Enclosed within its ancient city walls, which are a UNESCO World Heritage Site, you’ll find a captivating blend of medieval architecture and vibrant culture. The city's Old Town is a maze of cobblestone streets, lined with baroque churches, Renaissance buildings, and charming squares.

Located in northwest England, Birmingham has a tremendous history as an industrial city. Close to coal and iron ore supplies, it was here that Bouton and Watt harnessed steam power to run machinery. The Museum of Science and Industry resides here and provides an excellent look at England's history.

Makgadikgadi Pans National Park lies in northeastern Botswana and forms part of one of the largest salt flat systems in the world. The landscape is defined by wide open pans, sandy tracks, grasslands, and scattered baobab trees that rise from the dry terrain.