Two Grand Canyon-size features on the far side of the moon were likely formed in about 10 minutes after an unknown object ...

Two gigantic canyons on the moon — both deeper than the Grand Canyon — were carved in less than 10 minutes by floods of rocks ...

I had visited five national parks before I visited Mammoth Cave, including the Grand Canyon, but it was at Mammoth Cave that I truly fell in love with national parks. You see, in none of my five ...

Rampart Cave is 300m high in the walls of the beautiful and iconic Grand Canyon. Discovered in 1936 and full of animal dung it is an important research site. The cave shows how crucial scientific ...

Two gargantuan canyons on the moon were carved by a hailstorm of rocks — and that’s good news for future lunar astronauts.

450-million-year-old fossils of ancient giant snails and squids. Ceilings that rise 100 feet in the cave's Grand Canyon area. Stalactites, stalagmites and formations that look like oozing slime ...

Few movie and TV locations are as eternal and easily accessible as the Bronson Caves. Just two miles northeast of Hollywood & Vine in a canyon on Griffith Park's western edge, the caves have served ...