I've been meaning to visit this place for many years, and I finally managed it on Saturday. What a place!! Lined with flint & seashells made into various patterns. Tunnels leading off to round chambers dug underground. Apart from the last chamber, there is no lighting. However, the volunteers will lend you a torch. There is also a summer house with prints on the walls, showing what the area was like when the grotto was built. There are no toilets or cafes. Some of the footpaths are steep. Parking is on the residential streets outside. Open every Saturday & Bank Holidays, April to September. Admission £2.