I tried the caves only. You definitely need sandals. You walk down a flight of stairs into the caves which have a sulfur smell from the hot spring water. The cave is underground and has separate chambers. It's a little creepy and not recommended for someone who has bad anxiety or is cloister-phobic. The caves are on the small side. There were only about 5 other people there at the same time. Would not be very enjoyable if there is a lot of people.