We paid 100 to camp at the tourist center. They said the most level spot is the parking lot but we found a nice level spot off in the trees. We spoiled ourselves and took a long, 8hr, horse and hike trip up the volcano and to the ruins, cost 1000, really lovely guide names Joaquin. You can do just the ruins for 500 on horse or free (I believe) to hike out. Nice hot showers though you have to ask them to open/turn them on for you.

Blog: CarpeViam

Place: Centro Turistico de Angahuan

Visited: October 20th, 2015

Location: 19.54217, -102.23412