SeeCave
Sistema Ox Bel Ha
The Sistema Ox Bel Ha is a cave system in Quintana Roo, Mexico. It is the longest explored underwater cave in the world and ranks second including dry caves. As of February 2026 the surveyed length is 541.7 kilometers (336.6 mi) of underwater passages.
From Wikipedia, CC BY-SA 4.0.
Place data from OpenStreetMap, © OpenStreetMap contributors, ODbL.
Updated 11 Oct 2026. Something wrong? Tell us.