Puerto Rico, an unincorporated territory of the United States, is a Caribbean island rich in history, culture, and natural diversity. Its capital, San Juan, is a vibrant hub where centuries-old Spanish forts, pastel-colored colonial buildings, and lively plazas tell the story of the island’s complex past.

From grand castles to resplendent cathedrals, Tallinn’s Old Town neighborhood, a UNESCO World Heritage Site, is the perfect place to begin exploring. Enter through Viru Väravad, or Viru Gate, the former fortress whose remaining two towers beckon you into the heart of the city.

Wadi Rum, often called the “Valley of the Moon,” is a desert landscape in southern Jordan renowned for its dramatic sandstone mountains, sweeping red sand dunes, and ancient history carved into the rock. Its vast, otherworldly scenery has made it both a UNESCO World Heritage Site and a backdrop for films set on distant planets.

La Paz is Bolivia’s administrative capital, a city that clings to the walls of a canyon, rising from 3,600 meters to over 4,000 meters above sea level. That dramatic geography means it holds the title of the highest capital city in the world. From the crowded streets of the valley floor to the windswept plateau of El Alto, La Paz is a city of striking contrasts.

Bwindi Impenetrable National Park, located in southwestern Uganda, is one of Africa’s most extraordinary natural treasures. Its dense rainforest, often draped in mist, shelters a wealth of biodiversity and has been recognized as a UNESCO World Heritage Site for both its ecological significance and natural beauty. This ancient forest is among the few places on earth where travelers can come face-to-face with mountain gorillas in their natural habitat.