1. Cologne: Guided Highlights Tour with a Local
Explore the cathedral from the outside. View the Dionysius mosaic from the outside the Roman-Germanic Museum. Stop by the Heizelmännchen fountain. Discover the town hall, the Alter Markt, and the banks of the Rhine River. See the well-preserved Roman ruins from when Cologne was a Roman colony. Walk along the old Roman city wall and see the “Roman Tower,” the northwestern corner tower of the Roman city wall, which is almost completely preserved. Stroll down the Roman harbor road and see a section of the Roman sewer.