I spent a lovely few days with my friends in Matlock in the Peak District overt the summer. During my stay we visited Matlock Bath Spa. This is a Victorian 'inland resort' - a sort of retreat. It is famed for its rugged scenery which Byron likened to Alpine Switzerland. Part of the location's popularity stems from a hot spring with allegedly medicinal qualities. The minerals in the water petrify anything they submerge. Visitors to the (very entertaining) aquarium are able to see a 'grotto' of these strange objects. These weird artifacts (and a series of subterranean tunnels) are separated from the viewer by a barrier. I just wanted to clamber over it and hunt about for treasure and magical weapons.
Sources: Wikipedia and The Andrews Page.