The dazzling capital of the Czech Republic, the explorable Prague has fittingly been nicknamed "the City of a Hundred Spires." Halved by the Vltava River and notable for architecture Baroque, Renaissance, and Gothic, visitors will find much to take in here.

Olbia, located on the northeast coast of Sardinia, offers a blend of history and modernity. The city is known for its well-preserved ruins and historical sites, such as the Basilica di San Simplicio, an 11th-century Romanesque church built from local granite.

Antarctica’s Deception Island offers a dramatic landscape shaped by volcanic forces in one of the most remote corners of the world. Located in the South Shetland Islands, it is the caldera of an active volcano, its flooded interior forming a natural harbor known as Port Foster. This rare combination of volcanic activity and polar environment makes Deception Island a place where ice and fire meet.

This is a city one could get lost in for days, exploring the old Ming Dynasty walls and wandering through its superb museum. If time permits, you should also take a walk through Linggu Park, home of the Linggu Pagoda and other items of Buddhist interest. Even just a casual walk through the streets-replete with food vendors and baskets of live geese-will help convey the unique flavor of this city.

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.