Santorini Hot Springs
Although I'm 70, I'm still a good swimmer and had no difficuly in getting from the boat to the springs. To avoid the rocks mentioned by another reviewer, I just swam in instead of trying to walk. The springs (and the mud bath) were great! As the tour guide said, "Enjoy. The mud bath alone would cost you $100 at a salon." A lot of silliness was had by all. As far as the temperature of the springs was concerned; I was a bit disappointed that it was not an enclosed area but hot/warm water bubbling up beside the base of the island. If you moved just a few inches, the temperature would vary greatly. The spot that I found was definitely the 33C(~91F) advertised. One thing to keep in mind, and we were reminded of this several times before and after we signed up for the excursion, the mud can and did discolor light garments so don't wear anything you're really fond of. With a good book and a gin&tonic I could have spent quite awhile there.
Was looking forward to hotsprings and mud as advertised but ended up dissappointed as no mud and there were no hot springs the water was only slightly hotter than the surrounding sea and was no where near 33cele as advertised, very dissappointing if expecting a real hot springs with mud. The boat trip there was lovely for viewing islands but we went speciafically for hot springs.
Neutral / average
The Hot Springs was so much fun but getting to the red water was a pain! And the swim back...exhausting!! The crew on deck had to throw at least 5 life rings into the water to help people back on board. It's a great experience but you have to be an excellent swimmer and don't forget your water shoes because the rocks are slimy and can easily cut your feet!!