Are you searching for a Salt Cave Massapequa location that is well-priced and luxurious? At Opulence Spa we not only offer massages and facials, our salt cave is one of the largest on the island! The salt cave is the pride of our spa because it promotes ultimate wellness and health to all of our clients. Salt has been known for centuries as one of the most simple, yet highly effective treatments. This is why we had to install a salt cave in our spa!