Well worth visiting. The nearest town is probably 1.5 - 2 hours away from the main site. It is truly in the middle of nowhere. The pyramids are enormous and spectacular. Basically all of the site is shrouded in jungle. I do not think you can see the acropolis with surviving paintings but perhaps this has changed.

Also from the top of one pyramid you can see what looks like a mountain maybe 20 miles away in Guatemala. Very interesting and unusual for such a flat region! In fact it isn’t a mountain at all, but another pyramid at the (mostly unexcavated) El Mirador site in Guatemala. By some definitions, that other pyramid is the world’s largest. The calakmul pyramids are themselves enormous.

Cannot recommend the Mayan sites of the Yucatán highly enough. If you have only been to Tulum you are cheating yourself! Definitely worth a trip to Mexico!