There didn't happen to be a huge beehive near the top of the largest stone pyramid at Coba, was there? The view from the top was definitely awesome (aside from the potential for bee stings), because of the way you could see the lake appear in the distance that you couldn't see before because of the trees. We had quite the experience there at the hotel with a very cold water shower. :)
Yeah, it's too bad they don't let you go up the pyramid in Chichen Itza. That would be an amazing sight. Or for that matter from the other raised areas. Still, it's awesome just to walk around there and realize that someone with some incredible knowledge built that place. And yet, they or those that came after them could be so cruel and savage.
Tulum is more of a beach front property with smaller buildings. Not as much to really get up above and see, so I didn't mind that so much. The iguanas getting bigger the farther you went in was fun. Thankfully they weren't confrontational. :)
You can climb the pyramid at Uxmal (Yucatan, very steep and small steps), but if you really want the climb, you go all the way to Teotihuacan. Done that a couple times. The scale of everything there is mind boggling.