Roberta and I took the tour at the Wabasha Street Caves today. It was a lot of fun. Warning: it gets kinda scary when the tour guide talked about the resident ghosts.
Below is a sketch of the jumble of buildings outside the caves including Grumpy Steve's, a good place to get coffee and Belgian waffles. Also a sketch from memory of the tour guide talking about the gangster ghost and the mysterious girl ghost. Click on the sketches to make them bigger.