This Cenote is an easy drive after a hike of the ruins at Coba and should not be missed. There is normally a platform where you can place your belongings, but on our trip this was under about three feet of water. The workers here are stationed right at the parking lot, so you can leave your belongings in your car without worry. If you do take your car key with you, be 100% sure that you don't lose it (like some other visitors during our trip did) because it will not be able to be recovered depending on where you drop it.
Be ready for the water to be cold!
The water is very clear so you'll want to bring swim goggles or a dive mask with you, if not a snorkel. The more adventurous can jump off the platforms along the spiral staircase into the water. Apparently life jackets are available if you're not a strong swimmer, but I didn't see these when we first arrived, some other visitors had them on as we were leaving. There are bats living in the stalactites , as well as small fish in the water. You will be required to take a shower before going into the cenote, so don't bother putting on any makeup, sunscreen, insect repellant, hair products, deodorant, etc. before you go in (seriously, please help to protect the ecosystem here!).
I'm knocking a star off because there are multiple cenotes in this area and as you drive up to them, there's a station for temperature checks and to pay a per person fee (100 pesos/head if I remember right) before heading further up to the parking lots. Once we got to the parking lot though, we were asked to show a ticket before we were allowed into the cenote. However, we weren't given a ticket. We then had to argue with the worker in the parking lot that we had obviously already paid because otherwise we wouldn't have been allowed to continue up to the parking lot. read more