Entrance to a cenote (IMAGE) Goethe University Frankfurt Caption Cenotes were once sacred to the Maya, as the karst caves were considered the entrance to the divine underworld. Credit Björn M. von Reumont Usage Restrictions To be used only when reporting on Goethe University Frankfurt. Indicate copyright: Björn M. von Reumont License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.