Ischia, one of the most popular islands in the world this summer (2022), is well known for its thermal spa parks. And what is a thermal park you may ask? It’s basically a waterpark for adults – an outdoor park filled with pools of varying heat, some with special mineral properties, others with special massage water features, and others just for fun. Thermal parks abound on Ischia. Even our little hotel had a small thermal bath for guests. Indeed, no official visit to Ischia is complete without a visit to a thermal spa. On Dan and my recent trip to Ischia, we spent a day at Negombo Spa, which is rumored to be the nicest thermal park on the island. This is my review of our day there, including everything you need to know to visit a thermal park in Ischia!