You may see a large waterfall on many pools and not even realize a grotto is hidden behind it.

A swim­ming pool grotto or cave is basi­cally a con­crete room attached to the pool. The walls and the roof are con­structed of gunite or shot-crete. There are special engi­neer­ing require­ments for con­struc­tion of a swim­ming pool cave. Grottos may include a bench or loveseat where you can sit and view the water falling in front of you. They can also feature fiber-optic lighting, a sound system, and hydrotherapy jets. [Read more…]