We stopped to tour this castle while we were in port for one of our cruise stops. Marksburg Castle…read moreis one of two castles on the Rhine River that was never destroyed - it sits high up on a hill with panoramic views all around. The guide was energetic and full of interesting information. My favorite tidbit was that some Japanese businessmen wanted to buy the castle. When they were told it wasn't for sale, they were given permission to obtain the dimensions instead, and built an exact replica in Miyakojima, Japan. Trippy!
There's plenty to see inside: torture chambers, suits of armor, weapons, a witch's garden, and various castle furnishings. I enjoyed it all. If you have any mobility issues, it's a bit of a steep walk to the entrance. Once inside, there are uneven cobblestone surfaces and multiple staircases. There is a little gift shop and small cafe also. Definitely worth checking out.