If you’re eager for a little more adventure, keep on driving to Cologne, 45 miles from Hallschlag. There are plenty more interesting things to experience here, such as Cologne Cathedral and RheinEnergieStadion. Moenchengladbach, 60 miles away, is another destination that’s worth the journey. Take a look around Borussia Park and Rheydt Castle, two top-notch sights in the area.