Ten times longer than the Grand Canyon, and three times as deep, the Valles Marineris (The Mariner Valley) cuts through the surface of Mars. This grandest canyon in the Solar System stretches 4,000 km ...

If a hike to the bottom of the Grand Canyon isn't your thing, try seeing it from a glass-bottom overlook instead. The Grand Canyon Skywalk offers the chance to see the canyon's western end from a ...

If a hike to the bottom of the Grand Canyon isn't your thing, try seeing it from a glass-bottom overlook instead. The Grand Canyon Skywalk offers the chance to see the canyon's western end from a ...

There are few natural wonders that can challenge the great jaw-dropping size and beauty of the Grand Canyon. It is a mile deep and 10 miles across, showcasing an eye-catching array of layered red rock ...

A trip to Las Vegas wouldn't be complete without experiencing the awe-inspiring natural wonders just outside of it — particularly the Grand Canyon. We've rounded up the best Grand Canyon tours from ...

A groundbreaking fossil discovery in the Grand Canyon has unveiled exquisitely preserved soft-bodied animals from the Cambrian period, offering an unprecedented glimpse into early life more than 500 ...

Fire crews allowed a fire to burn through brush on the Grand Canyon’s North Rim. Then they lost control. Tourists at Mather Point on the South Rim of the Grand Canyon watched smoke rise from the ...