Had to do the grotto as a once in lifetime experience. been there and done. The grotta Gusti is a lavish spa modern and clad in white and green marble throughout. the staff at reception was friendly and nice. The thermal pool was the best, warm and the forced air in the curved walls (with body sized seating) was awesome giving you a very good massage. next we did the grotto, heated by volcanic action but not like a steam room. the italian gent that gave us our star wars like tunic to wear and placed our wet bathing suits in the warmed locker wasnt the most friendly guy but ok, the grotto an actual cave was somethng to see, warm but not very hot. the last room to sit has deck chairs, avoid the back room someone urinated and the smell is bad. the cave air is acid or like sulfer smell. but 50 min is ur max so do it for once in a lifetime. after that massages, mine was very good but the young man that gave my daughters not so good , inexperience perhaps. expensive but how many grottos spas can you visit.
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