If you’re in the mood for more adventure, keep on cruising to Bremerhaven, 40 miles from Horneburg. You’ll find plenty more fascinating things to experience here, including Wilhelm Bauer Submarine Museum and Zoo at the Sea. Nothing screams fun like a road trip does, so keep on cruising to Bremen. It’s 45 miles away and also has a few worthwhile sights, such as Bremen City Hall and Weser Stadium.