Cenote is a term that has its origin in the Mayan word tz’onot and means well or abyss. A cenote is a reservoir of spring water with a certain depth.
The cenotes emerged in caverns after the roof collapses of one or more caves. With the accumulation of groundwater, ponds were formed that can be more or less deep. The cenotes can be underground, semi-open or open, characteristics that are related to the age of the structure (the younger ones maintain their dome, while the oldest ones are already open).
For the Maya, the cenotes were sacred places. There they used to make sacrifices and rituals that were framed in their cosmology. It is not yet precisely known, however, how ceremonies took place in the cenotes.