An essential passageway between the Atlantic and Pacific Oceans, the Panama Canal is an extraordinary technological landmark and a testament to human innovation. Built in the early twentieth century by American engineers, the canal weaves through the Panamanian isthmus and allows easy access for commercial freighters and cruise ships alike.

Marbella, located between the Mediterranean Sea and the Sierra Blanca mountains, is often associated with its luxury resorts and famous marina, Puerto Banús. But beyond the polished storefronts and designer yachts, the city has a layered past. Its old town, known as Casco Antiguo, is a well-preserved network of narrow streets built during Moorish rule, with whitewashed buildings, flower-filled balconies, and hidden plazas like Plaza de los Naranjos, which dates back to the 15th century.

Tartu is celebrated for its vibrant cultural scene. The city's bustling Town Hall Square is surrounded by charming 18th-century buildings and hosts various events throughout the year. The Tartu Art Museum and the KGB Cells Museum offer fascinating insights into Estonia’s history and art.

Bartlett, New Hampshire is a small White Mountains town with a deep connection to outdoor adventure and quiet mountain charm. Founded in the late 18th century, Bartlett began as a logging and railroad hub, and remnants of that past still echo through its historic buildings and covered bridges. The Bartlett Roundhouse, a relic from the town’s railway days, now serves as a museum and reminder of how trains once connected this remote region to the rest of New England.

A charming city nestled on the banks of the Rhine, Mainz, Germany lies southwest of Frankfurt and is replete with historic buildings and famous museums. The city's Altstadt district meets the river's edge and boasts a variety of beautiful and fascinating landmarks.