Ndaxagua
Ndaxagua (also Ndaxagua cave, Ndaxagua natural tunnel), locally known in Spanish as El Puente Colosal ("Colossal [Natural] Bridge") is a natural cave with double entrance and archaeological site, located in the extreme northern end of the Coixtlahuaca Basin, central-southern Mexico. The cave was most likely used by Mesoamerican cultures such as the Zapotec and Mixtec as well.