Sandcastle Waterpark is the UKs Largest Indoor Waterpark. The Waterpark features over 18 slides and attractions including water slides, fun pools, wave machine, water chutes, burger bars, snack bars, arcades, swim shop and much much more. So, if you’re looking for things to do in Blackpool and fancy a great day out make sure you visit Sandcastle Waterpark. We cater for families with children of any age and we can even organise birthday parties. Sandcastle Waterpark is opposite the Pleasure Beach on the sea side of the promenade. Telephone: 01253 343 602.