Located in central Germany, Frankfurt is a vibrant cultural and economic hub nestled on the Main River. Museums and architectural gems abound in Frankfurt, from the Goethe House, to the picturesque timber houses of Römerberg town square, to the Museumsufer, a collection of museums lining the banks of the Main.

Portovenere, in the region of Cinque Terre, is a characteristic medieval village situated at the far west of the gulf. With its colored, narrow high houses, the Genoese Castle, the St. Pietro Church on the steep cliff, it unites history with charm.

Welcome to Nairobi, safari capital and the largest city in Kenya. At one time a simple hydration spot for the Maasai, this high-energy East African city now strikes a balance between the cosmopolitan and the natural. In its adjacent Nairobi National Park, visitors will see lions, zebras, giraffes and rare black rhinos.

Portland, Oregon, is a city where natural beauty and urban innovation coexist harmoniously. Nestled between the Columbia and Willamette Rivers and framed by volcanic mountains, Portland offers an array of outdoor adventures alongside its renowned cultural scene. Visitors can explore the lush expanses of Forest Park, one of the largest urban forests in the U.S., or take a leisurely stroll through the Portland Japanese Garden, which showcases exquisite traditional Japanese landscape design.

Kos, an enchanting island in Greece’s Dodecanese archipelago, is a gem steeped in both history and natural beauty. Known as the birthplace of Hippocrates, the father of modern medicine, Kos is home to the ancient Asclepeion, a healing temple where Hippocrates taught his students. Visitors can wander through the well-preserved ruins and enjoy sweeping views over the island and the Aegean Sea.