Kẻ Bàng National Park lies in central Vietnam, near the border with Laos, and is known for its vast network of limestone mountains and underground rivers. The park forms part of one of the oldest karst landscapes in Asia, shaped over millions of years into a maze of caves, cliffs, and dense forest. Among its most famous features is Sơn Đoòng Cave, recognized as the largest cave on Earth, with sections so vast that clouds can form inside and a jungle grows beneath its collapsed roof.

Nestled in the heart of Greece's Thessaly region, Kalabaka is a charming town renowned for its striking natural and historical attractions. Most famous for its proximity to the Meteora rock formation, Kalabaka offers a unique blend of geological marvel and spiritual history.

Volcanoes National Park, in northwestern Rwanda, is a place where dramatic volcanic landscapes meet extraordinary wildlife encounters. Stretching across the Virunga Mountains, the park is dominated by five towering volcanoes whose slopes are cloaked in rainforest and bamboo.

Kerak is a fortress town 75 miles (120km) from Amman, and contains one of the two major Crusader castles in the Kingdom. The castle, built to protect the approach to Jerusalem, stands on a craggy plateau 4,300ft above sea level. It was built in the early part of the 12th century and held for 50 years by the Crusaders until they were defeated by Salah al Din (Saladin) in 1189.

Hammerfest, located above the Arctic Circle in northern Norway, is one of the northernmost towns in the world with a population of over 10,000. It’s a place where the midnight sun shines from mid-May to late July, and the polar night sets in from late November to mid-January. Historically a hub for Arctic hunting and fishing, Hammerfest was also the first town in Northern Europe to install electric streetlights in 1891.