Scattered throughout the Old Town, these twelve churches are among the oldest buildings in Cologne—most of them date back to the 12th and 13th centuries. They’ve all got that heavy Romanesque look, but each one’s a bit different. Great St. Martin stands out with its massive tower right by the river, St. Gereon has got an unusual oval dome, and St. Maria im Kapitol is one of the largest. You don’t need to see all twelve, but stopping in at a couple while you’re exploring the Old Town gives you a good feel for the city’s medieval side.

The Museum of Pop Culture delves into the world-shaping impact of pop culture through immersive exhibitions and interactive experiences. From rock music to science fiction, MoPOP showcases the creative expressions that define contemporary culture. The eccentric architectural style of the museum is a major draw in itself.

Ernest Hemingway donated his former home of two decades to "the people of Cuba" after moving away, and it remains largely undisturbed since the 1960s. Although one cannot technically come into the house, there are plenty of spots to peek in through the windows, as well as explore the premises containing a tiny cemetery of Hemingway's pet dogs and his fabled boat Pilar, docked in what once was a tennis court.