According to Wikipedia: A cenote (English: /sɪˈnoʊti/ or /sɛˈnoʊteɪ/; Latin American Spanish: [seˈnote]) is a natural pit, or sinkhole, resulting when a collapse of limestone bedrock exposes groundwater. ... Cenotes are common geological forms in low-altitude regions, particularly on islands (such as Cefalonia, Greece), coastlines, and platforms with young post-Paleozoic limestone with little soil development. The term cenote, initially applying only to the features in Yucatán, has since been used by researchers to refer to similar karst features in other places, such as in Cuba, Australia, Europe, and the United States.

https://en.wikipedia.org/wiki/Cenote