Long regarded as one of the freest-thinking college towns in the U.S., Ann Arbor is home to the University of Michigan, the Gerald R. Ford Presidential Library and Domino's Pizza. While you're in Ann Arbor, be certain to see the city's many fascinating historic buildings; the Kelsey Museum of Ancient and Medieval Archaeology; and Kerrytown (a diversity of specialty shops and eateries in restored 19th-century buildings close to the Farmers Market).

Columbus, city and seat of Muscogee County, western Georgia, a port at the head of the Chattahoochee River, opposite Phenix City, Alabama. Columbus is a regional transportation, trade, cultural, and manufacturing hub. Its many textile, food-processing, and metalworking industries are powered by hydroelectric plants on the Chattahoochee River.

St. Louis is a major city in the state of Missouri, United States, located along the western bank of the Mississippi River. It is widely recognized for the Gateway Arch, which defines its skyline and reflects its historical role as a point of movement toward the western parts of the country.

Annapolis may be best known as the state capital, but its real charm lies in its deep maritime history, walkable streets, and Chesapeake Bay lifestyle. Founded in 1649, Annapolis served as the temporary capital of the United States in 1783 and is still home to the oldest state house in continuous legislative use. A visit to the Maryland State House, where George Washington famously resigned his military commission, offers a direct link to the early days of American democracy.

Tromsø, a gem nestled in the Arctic Circle, offers an unparalleled blend of natural wonders and cultural richness. Known as the "Gateway to the Arctic," this Norwegian city is famed for its spectacular Northern Lights. Between September and April, Tromsø becomes a prime location for witnessing the aurora borealis, a mesmerizing display of green, purple, and pink lights dancing across the polar sky.