Luckey,
The rainforest is kind of like a fancy sauna. The main room has these very large heated tile lounges around a fountain. There are 3 different aromatherapy heated rooms. 2 of these are pretty heavy and not very big, but you can not stay in them for very long. The third is very mild with again the heated tile seats. I always took a towel to sit on because it was way to hot to sit on.
Also, as mentioned there are the showers. Of course, a bathing is a must because the showers are out in the open. They do provide shampoo and stuff to use.
I never had any problem with it being too crowded. In fact, there were quite a few times that no one else was in it. I brought a book and enjoyed!!!
The only problem I had was that there was a group of about 5 who were very loud and didn't really understand the meaning of relaxation.
Lorie