Hells Canyon might be deeper than the Grand Canyon, but it's barely 2 million years old, according to a new study.

The Yarlung Tsangpo Grand Canyon is Earth's largest terrestrial canyon, stretching 314 miles long and almost 20,000 feet from top to bottom at its deepest point in the Tibet Autonomous Region.

Arizona’s giant natural wonder reliably strikes awe, whether tackled from inside or above.

They lined up to catch the shuttle to Hopi Point, and gathered in the ... They were looking at deep time. The rocks in the Grand Canyon span from 270 million to 1.8 billion years old, a stunning ...

Its deep majestic canyons and narrow trails ... bottom of the canyon or going over the edge yearly. At Yaki Point on the Grand Canyon's South Rim, more than a dozen search and rescue volunteers ...