Hierve el Agua (Spanish for "the water boils") is set of natural rock formations in the Mexican state of Oaxaca that resemble cascades of water. The site is located about 70 km east of Oaxaca City, past Mitla, in the municipality of San Lorenzo Albarradas, with a narrow, winding unpaved road leading to the site. The site consists of two rock shelves or cliffs which rise between fifty and ninety metres from the valley below, from which extend nearly white rock formations which look like waterfalls.
The site is located in a very isolated region with rough terrain, dominated principally by holm oak forest, cactus and other semi desert vegetation. The "waterfalls" or rock formations are on cliffs of mountains that rise abruptly from the narrow valley floor below. It is located in ethnic Mixe territory, with the two closest and most populous communities being San Lorenzo Albarradas and San Isidro Roaguia with populations of 1403 and 320 respectively (2005). The springs that produce the rock formations are one of the few water sources in the area.
In addition to the artificial pools on the Amphitheatre side, a number of other services have been built for visitors such as food stands, small markets, cabins and a regular swimming pool. The cabin area, called "Turis Yu’u," with its pool was built in the 1990s and offer areas to change clothes, shower, eat in an open air restaurant and for overnight stays although the accommodations are very basic. This complex, as well as many of the other stalls are owned by residents of the Roeguia community.