These three destinations are top-notch for underwater natural wonders, according to our readers. Find out where to go for the ultimate in cave and cavern exploration.

A cave diver's paradise, the Bahamas is home to an extensive network of life-sustaining underwater caverns chock-full of history—and a whole lot of mystery.

Find out what it takes to livestream a concert from an underwater cave system that sits under the Scandinavian Mountains.