We went on a tour operator excursion to Ischia, as the spa was included, and a tour of the island. The island was truly gorgeous, relatively uncommercial, and we fell in love with it, as did many other day-trippers, if the comments we overheard were anything to go by.
The spa (Tropical Gardens) is set on a cliff top overlooking a lovely fishing village.
As you drive around the island, you see geysers shooting steam into the air, as it is a volcanic island, hence the prolific amount of spas. This is one of the loveliest places that I have visited and just had a lovely relaxed atmosphere about it. The one drawback (though it wasn't for us) is that very little English is spoken there.