Swimming through an underwater tunnel in Horseshoe Bay, Bermuda. We swim from the inside of the bay to the open water. Filmed with a GoPro.

Freediving Swallow's cave in Vava'u, Tonga 2015. Music is Summer '97 by GRiZ. End photo by Jorgen Rasmussen.

While diving near Ambergris with Jim and Carol Brooks, we had this unique experience swimming through a tunnel. Pretty Cool if you don't think about what ...

Swimming under a large deep water tunnel in Santa Ponsa. We misjudge the current the first time and nearly run out of breath!

Video taped by Yuri Lipski who died in a diving accident in the "Blue Hole", Dahab, Egypt at 28.4.2000. The video shows rare footage taken by Yuri's camera, ...

Swimming through the Volkswagen Blowhole in Laguna Beach, CA. The Volkswagen Blowhole is an underwater cave near Pearl Street Beach in Laguna Beach ...

This is a few years old but I haven't been able to post it until now... Good for a laugh! This clip has been edited a bit for time, the full episode is available from ...

Las Grietas is a secluded swimming hole accessible by a short hike on Santa Cruz island. You can even swim through an underwater ...

AC4 underwater gameplay: Blue Hole Shipwreck - collecting all underwater chests and Animus Fragments. Area: Charlotte - hard difficulty. Special items found: ...

Underwater archaeology is an exciting, but "sometimes risky field":of studies. To eliminate those risks a European ...

An adventurous diver risks all as he attempts to swim underneath an elaborate underwater cave in only one breath. Check it out for yourself in this incredible clip ...

Laguna Beach's notorious drowning spot is handled like a pro as Anthony Armer dives underwater against the surge-waves and rocks to capture some amazing ...

WOOHOO GOT THE UWR BACKKKKKK! Sorry about the bad camera angle, but hope you enjoy anyway. I will do this underwater when I get the regulations ...

Don't think it's possible? Check out this guy's unbelievable talent as he holds his breath while solving 3 separate Rubik's cubes underwater. Now that takes ...

Divers swim with pyrosome bioluminescent sea worm.

WE REFRESH THE AIR WITH A SCUBA TANK** Q. Isn't this dangerous? A. Yes! The biggest danger is something called Pulmonary Barotrauma. That basically ...

Sometimes you need to just slow down in life and look around. This is what I do everytime I freedive. Everyone is always busy rushing to work, busy doing this, ...

Anthony Armer documents his ambiti

Diver risks one-breath swim through deep underwater tunnel

Diver risks one-breath swim through deep underwater tunnel