The one thing the Riviera Maya is known for is it's cenotes, which are, for the most part, underground rivers. I mean, there are quite a few that are uncovered, or half enclosed (my favorites). These waters used to be the Mayan's main drinking source. They are mildly salty, but much, much softer than ocean water. One only has to go for a dip to understand how energetically charged they are. It's unexplainable. And of all the beaches I covered, the cenotes are quite special and deserving of a separate mention. There are too many to name, but they are literally everywhere. Some of them charge a small fee for entry and equipment rental. So, in my opinion, you're much better off seeking and going to find a cenote alone rather than on a tour. You'll have much more time to enjoy them that way.
I like to take my time exploring a space, so tours just aren't for me. I've literally only been on one the whole time I've been here. And that's because I got a sweet discount from a friend to take my mom to the ruins when she came to visit. We hit up 3 locations in one day and were back by 6:30. It was a lot of bang for the buck, so it made sense in that situation. Being somewhat "local" I typically don't feel the need to rush here and there. Especially since I know that Playa Del Carmen is a place that I plan to come back to again and again.
Akumal
Finally, I have one honorable mention here, because this spot has been on my list to get to for awhile now, and that's Akumal. I have been wanting to get to Akumal to swim with them damn turtles for a couple of months now. I was waiting to share the experience with my mom when she came to visit. However, as the universe would have it, the week before she got here the local government had gotten really strict about the rules for visiting the area. Now that the dust has cleared, we've been informed that it's still open to the public, you've just gotta rent your equipment ahead of time (anywhere in Playa) and bring it with you. DO NOT accept offers for a "tour" as those are now illegal. Which is fine with me, as I previously mentioned, I don't care for them anyhow.
A friend of mines, Sarah, went and said that the water is calm enough that you can manage to scuba without a guide, no problem. And she, like I, is terrified of the idea of underwater anything (one of the many things we have in common ;) ). And, by the way, she'll be SO happy when I tag her on IG to know that this post is FINALLY up. Yeah, it's taken a minute. Sorry Sarah, love you!
So that's it, for now. If you happen to find yourself in the Riviera Maya, hit me up on the 'Gram. It's now my second home (really 3rd, next to Atlanta).