This was an interesting experience and worth the money. The walk through the caves is not too strenuous -- there are some slippery parts and a bit of stair climbing -- which we appreciated since we were tired from a morning at the nearby ruins. This makes for a good little trip along the Puuc Route -- if you are coming from Merida and start at Uxmal, going around to Labna, and then the Lol-Tun caves are basically on your way back to Merida.
Details: As of now, the entrance fee per person is 105 pesos. This does not include the guide service, which is required. Our guide was very clear about making sure we knew this and asked for a combined donation from our group of 600 pesos if we enjoyed the tour. It was myself, my husband, and one other couple so this worked out to 300 pesos per couple (exchange rate now is about 13 to $1). This seemed reasonable to me -- at Uxmal the bilingual guided tours are 700 pesos per group.
There are set times when the tours depart (about once per hour with a small lunch break) so be sure to check on this before you go.
Our tour guide (Pablo) seemed engaged and well-versed in the caves. Parts seemed a bit routine, but we found it even more interesting when we started asking more questions about Mayan history, current events (we noticed he was speaking a Mayan dialect to another tour guide), etc...then his knowledge really shined through. His English was excellent.
All in all, very neat caves -- I've been to many caves and these have some things I've never seen before. Worth the trip!
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