This may be just a coincidence but have a warning to issue. Before visiting the site a friend told me about how her Grandmother and cousins had visited the Ruins before. Her Grandmother cursed on the sacred grounds and then had horrible misfortures for the rest of her vacation.
Well my mother and I visited the ruins and were caught in a horrible torrential downpour. The paths were flooded with mid calf deep waters but the sacred grounds around the ruins (they were roped off) were not flooded. My mother chose to trespass through the center grounds and I just walked along the edges.
18 hours later we both had a sore throat and I had a rash. 36 hours later my sore throat was gone but my mother developed additional symptoms, such as a fever, aches and pains, sinus drainage and a cough.
It has been 4 weeks since our trip and she STILL has a cough.
Beware do not anger the Mayan gods!
But really the ruins are awesome to see.