Cave Diving

In 2006 and 2007 a number of large previously explored and mapped cave systems have been connected utilizing sidemount cave diving techniques and many times no-mount cave diving techniques in order to pass through these tight cave passages, creating the second largest connected underwater cave systems on the planet, Sac Actun, which presently has a length extent of 155 km (QRSS for current statistics).
Many cave maps have been published by the Quintana Roo Speleological Survey (QRSS).