underwater cave

Researchers have discovered rare fossils in a famous underwater cave Hoyo Negro, in Mexico.

Researchers of the Gran Acuifero Maya (GAM) Aquifer Discovery Project have discovered the world's largest underground cave system called Sac Actun in the Yucatán Peninsula

Archaeologists find the largest underwater cave in the waters off the southeastern Yucatan Peninsula of Mexico, the International Business Times reported on January 17.