Super nice Spa. They have a 'sauna' cave where you can go into the mountain where it is hot and moist. Outside is a very nice pool with water from the spring inside the mountain. The water contains a lot of calcium (I think) which makes it really nice for your skin (it's cleansed after a few hours).
Response from the owner - a week ago
Dear Martijn, thank you for your lovely review. We hope to welcome you to Grotta Giusti soon.
Very good hotel, good swimming pool, it also have 2 hot thermal pool. Spa is good and the grotto is something to visit! 4 start is because of the price, if you don't want the spa there are better hotel for less.
Response from the owner - 8 months ago
Dear Mr Romani,
thank you for your comment about Grotta Giusti.
We hope to welcome you soon !