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.

Scoresby Sund (Kangertittivaq in Greenlandic), on the eastern coast of Greenland, is the largest and longest fjord system in the world. On the northern side of the fjord's mouth sits Ittoqqortoormiit, the only permanent settlement in the region and home to less than 500 residents. The region is well-known for its Arctic flora and fauna.

Progreso, a coastal city in the state of Yucatán, offers travelers a relaxed atmosphere with strong ties to the sea. Founded in 1871 as a port to support trade in the region, Progreso now welcomes both cargo ships and cruise liners to its shores. Its most defining feature is the Progreso Pier, one of the longest in the world, stretching over 6 kilometers into the Gulf of Mexico.

Oban is located in the northern part of the Scottish Highlands. Renowned for the beauty of the land and the excellent scotch made there, Oban is an indisputable treasure of nature.

Tel Aviv began in 1909 as a new neighborhood beside the ancient port of Jaffa. The city is now home to the largest cluster of Bauhaus-style buildings in the world which earned UNESCO recognition for its early 20th-century urban planning. Visitors can explore those structures on guided architectural walks through streets like Rothschild or Dizengoff.