Xibalba

Literally nothing happens for the first 1hr 10. And it doesn't really improve the movie when it does.

If you even hit play on this film, you know what you're getting into. It's corny, bad acting, horrible plot, the usual B film about Mayan "noble savages." Weird combination of facts and new age theories as one other user mentioned. Good option if you know you're going to fall asleep, and if you manage to stay awake it's at least "so bad it's good"-ish.

Not much action. Not much horror. Not much suspense. Some interesting locations, but the movie is slow, the plot weak, characters shallow. Minimal background and history. An hour in, little had happened. As another reviewer mentioned, they're supposed to be top expert divers. They don't use rebreathers. I was uncomfortable listening to them jabber in underwater caves when one would be conserving air. It should have been silent with captivating underwater footage. The dialogue foreshadows what's to come. I wanted to be drawn in more than I was. I ended up just wondering if I wanted to see the end or not. All the suspense was in the last 20 minutes. Super cheesy. It got so ridiculous at the end, I couldn't take it. Just another greedy white man with no respect for the culture of others. Skip this and watch The Abyss!

It could have been a good movie with a better script. Also the aliens were so stupid looking it could have been a comedy. I don't think saying the aliens were a joke is a spoiler even if they spoiled the movie.

It's definitely a SyFy Channel wannabe, but actually with a far better plot and cinematography. The biggest con is it takes forever to truly get to the action with the "aliens". While the build up is decent it lacks energy. The direction and story building is there but the actors for the most part seem to just go through the actions. The fact that the build up takes so long and you invest in watching for a payoff the payoff comes slate and leaves the movie open as if this were a pilot or the beginning of a series of movies and with the premise used. Sadly, because of that the ending was empty as a standalone.