Must do experience!!!!! - Wow This trip was totally worth it. We had a great time visiting the archeological sites, we did pay for a guide. There is just so much history there that is important you absorb all the Information. We had such a blast, we meet new people. We did the walk to the waterfall and another small arqueológicas sure with a great young guide; a Mayan girls called Vania chambor Espinoza. 13 year old who knows her way around the jungle. We learned about animals and medicinal plants; and to top it off we swam for more than an hour in the waterfall. Honestly such of a great adventure. Thing you need to know, there is no internet, you can buy at the small convenience store they give you a code which is for 1 hour and the cost is 25 pesos per hour, keep in mind that if you want to use it you have to be close to the store, I was to far away but I used it the next day; also no TV, the point of this is unplugged from electronics; instead we enjoyed the night sky and a couple of beers. The Lacandon people are super nice and very helpful. We had a blast. I hope you do to.