Cave of the Bells
Cave of the Bells is located in Sawmill Canyon on the eastern slopes of the Santa Rita Mountains of Santa Cruz County, Arizona. The cave contains a lake which is 80 meters below the entrance level. The lake has been measured at 76 °F (24 °C) and is believed to be warmed by sources below. Nearby Onyx Cave is also of interest.
Cave data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).