The geology teacher spent most weekends exploring and mapping the island's complex system of underwater caves. "Mallorca is much more beautiful underground than above ground," he says. Pere ...

In the Sac Actun Cave System, Cenote Pet Cemetery has a secret subterranean world of groundwater pools. (Photo: Canva) Sistema Sac Actun (Sac Actun System) is part of the longest underwater ...

Beneath the land surface of the Bahamas, the underwater caves known as blue holes stretch for hundreds of miles in all directions. Today, these labyrinthine passages host a variety of tiny sea ...

In a flooded cave system in the Mexican state of Quintana ... But there is hope, says Thymann, and documenting this dense habitat of underwater caves may be the first step in protecting the ...

I'm relieved not to have to put into practice the suggested method for vomiting underwater ... cave shrimp don’t need surface pigmentation. Only part of the shrimp’s digestive system has ...