Be sure to have enough gas in the tank, because Cologne is worth a detour. Situated 20 miles from Ruppichteroth, it has some terrific attractions, such as Cologne Cathedral and RheinEnergieStadion. Get set to start racking up those miles, because Rhine Tower and Duesseldorf City Hall are also a rewarding day trip. You’ll discover these popular sights in Düsseldorf, 40 miles away.