Guanajuato is situated between the dry north of the country and the more verdant south, and geographically belongs to the Trans-Mexican Volcanic Belt, the Mexican Plateau.

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.

Alaska's largest city is the perfect place for anyone who wants a vacation filled with wildlife, outdoor activities, glaciers and gorgeous parks. Explore the rich culture and history of the indigenous people at the Alaska Native Heritage Center, hike the exquisite landscape of Flattop Mountain and finish the day with one of the many diverse restaurants and local beers.

Once the commercial center of the ancient world, Ephesus is an archaeological splendor and an essential stop on any visit to Turkey. The city, whose wealth and patronage support its splendid architectural program, was dedicated to the goddess Artemis.

Niger, located in West Africa, is a country of vast landscapes and diverse cultures. Much of its territory is covered by the Sahara Desert, with rolling sand dunes, rocky plateaus, and oasis towns defining the northern regions.