A groundbreaking discovery beneath the waters ofChetumal Bay, Mexico, has captivated oceanographers around the world. The ...

Escape crowds of Hawaiian tourists and venture to this stunning underwater cave on Oahu that boasts a magical ambiance and ...

It took only two minutes for the quake’s tremors to reach the waters of the collapsed cavern and slosh them around as if they ...

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 ...

Three months ago, Xisco Gràcia experienced what he describes as every diver's worst nightmare - he found himself in an underwater cave, relying on an air pocket for survival. As hours turned into ...

A group of divers have connected two underwater caverns in eastern Mexico to reveal what is believed to be the biggest flooded cave on the planet, a discovery that could help shed new light on the ...

Take a deep breath and dive below the surface with cave-diving experts and scientists in the video above. Find out what it takes to plunge into the dark and mysterious world of underwater caves. Caves ...

From a protected cove on Long Island, Dean’s Blue Hole—Earth’s deepest known underwater cave—plunges more than 600 feet into darkness. The entry to South Passage is decorated by ...

(This program is no longer available for streaming.) Follow a fearless team of scientists as they venture into blue holes—underwater caves that formed during the last ice age, when sea level ...