Sunny days at the beach only happen a few months out of the year in New England, but The Copper Cave in Plaistow offers a spot where you can enjoy the benefits of a salty beach day all year ...

Why it's incredible: The cave is so deep, the world's tallest building could fit inside it. The Hranice Abyss — or "Hranická propast," in Czech — is the deepest known freshwater cave in the world.

Veryovkina Cave reveals more mysteries the deeper you go. Here’s everything that makes this cave a world of its own. Some of Earth’s most extreme frontiers lie beneath our feet, in places so ...

Exploring a cave is never a disappointing experience. Every craggy wall tells a story, every gloop of muddy moss tells a tale of the past, every window of light illustrates how nature is a great ...

Beneath the Earth’s surface lies a world so extreme and isolated that it seems more like an alien planet than part of our own ...

Deep underground, thousands of years of silence are abruptly broken by a researcher singing. His voice seems to awaken the walls of the cavern as the intimate space comes alive with the sound of our ...

Scientists first described the flooded cave in 2016 but determined its extraordinary extent years later. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it ...