Cenotes

Cenotes and their regional equivalents: natural sinkholes formed by the collapse of limestone bedrock that expose the water table beneath, following the Yucatan cenote naming convention used across the karst-dissolution literature. Includes vertical karst shafts that drop directly to standing or flowing water (Sotano de las Golondrinas). Belongs here: any sinkhole whose defining feature is the exposed groundwater at its base. Does not belong here: a dry sinkhole or doline with no exposed water table, or a cave or karst landscape whose own identity is not centered on a single water-filled shaft (Karst Caves and Sinkholes).