This was a simple step well recommended to us for a quick stop. It didn't seem much from the outside but once we were in, free of charge, the step well was fairly impressive. It is a single sloped well going down a few levels with stone walls and unfortunately now an empty bottom. However, go to the bottom and look up to see the mass of bats on the underside of the slightly domed ceiling. Good sight for half an hour and is close to other attractions.