Augsburg was founded in 15 BC under the rule of the Roman emperor Augustus. For 400 years the city was the seat of a provincial government of the Roman empire. Its ideal location made it a crossroad of all important routes to the south. An advantage from which the powerful merchants and bankers, the Fugger family and the seafaring Welsers, likewise profited. They elevated Augsburg to rank among the world's most powerful cities. Kings and emperors were frequent guests here.

Arequipa, known as the "White City," is built from sillar, a pale volcanic stone that glows in the sunlight. This architectural detail gives the historic center its striking appearance and has earned it recognition as a UNESCO World Heritage Site. Towering above the city is the perfectly symmetrical Misti Volcano, which, along with two neighboring peaks, forms a dramatic backdrop.

Da Lat is a highland city in Lam Dong Province, central Vietnam, situated on the Lang Biang Plateau. Its elevated setting gives the city a cooler climate than much of southern Vietnam, while pine forests, hills, lakes, and agricultural valleys surround the urban area. Da Lat is known for flower cultivation, vegetable farms, coffee plantations, and distinctive French-influenced architecture.

Idaho, known for its rugged landscapes and outdoor adventures, offers visitors a blend of natural beauty and cultural charm. Boise, the state capital, is a vibrant city that boasts a thriving arts scene and a rich history. Explore the Boise Art Museum, which features contemporary and modern works, or take a stroll along the Boise River Greenbelt for scenic views and recreational opportunities.

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.