If you’re interested in discovering what kinds of toys and equipment can be found in a really well equipped dungeon then I’d point you at this post/video. It feature Domina M showing Rachel Rampage around her Paris space Studio Xème. As you’d expect Domina M has a ton of really cool equipment that looks like it’d be a lot of fun to play with. The metal bondage pieces are a particular highlight.
Here’s a shot of Domina M with some of her bondage furniture, sourced via her site.