Nestled in the Aburrá Valley and surrounded by the Andes mountains, Medellín offers a stunning backdrop for visitors and boasts a pleasant climate year-round, earning it the nickname "City of Eternal Spring."

Plovdiv, one of the oldest continuously inhabited cities in Europe, carries over 8,000 years of history layered into its streets. The Roman Theater, still in use today, was discovered by accident in the 1970s and now hosts operas and concerts overlooking the Rhodope Mountains. Nearby, visitors can walk the remains of a Roman stadium buried beneath the main pedestrian street, where modern shops and cafés stand above ancient foundations.

Český Krumlov, a picturesque city in the Czech Republic, is a treasure trove of medieval charm and architectural splendor. Nestled in the South Bohemian Region, this UNESCO World Heritage Site is renowned for its stunning Český Krumlov Castle, which towers over the city and offers panoramic views of the winding Vltava River and the old town's red-tiled rooftops.

As a city located in a Baltic Sea archipelago, it's not surprising that Stockholm has 50 bridges and sightseeing boats moving people between its 14 islands. This contemporary and welcoming capital of Sweden is nonetheless easily navigable by foot. Every district here has a distinct flavor, from the sophisticated Östermalm to the bustling downtown energy of Norrmalm to the delightful Old Town.

Bikini Atoll, a remote ring of islands in the Marshall Islands, is one of the most sought-after wreck diving locations in the world. These underwater sites are preserved in a time capsule-like state, providing a rare look at history submerged in a silent world of coral and marine life.