If you’re at Bad Karlshafen, Germany, you can see a tower on the mountain in the south. It is the Hugenottenturm (Huguenot tower) built in 1913. The tower was founded by Johann Josef Davin originating from a Huguenot family and living in Bremen. His ancestors fled from France because the were persecuted due to their Protestant Christian belief. As the city was founded in 1699 as a Huguenot city to give them a new home he was thankful and wanted to give something back.
The Hugenottenturm is a large round tower with an attached building. It is open around the clock and you can enter the building and climb up. But already from the terrace in front of it you can have great views on the city and the river Weser. You can get up there by leaving the city centre via a bridge over the river Diemel. After crossing a road stairs lead you steadily up the hill and narrow paths along the mountain lead you to the tower. Especially after a lot of rain, the way can become slippery and dangerous. When I was up there a recent storm had blocked the way multiple times by fallen trees.