Valles Marineris, after the NASA Mariner space probe that first imaged this huge scar on Mars
Earth's Grand Canyon.
The answer is: Grand Canyon
the grand canyon
The Grand Canyon.
the Grand Canyon
the grand canyon
the answer is grand canyon
The name of the Grand Canyon's river is the Colorado River.
The colorado river formed the grand canyon
John Wesley Powell, named the Grand Canyon.
Valles Marineris
Mars. Valles Marineris would hold the whole of Earth's Grand Canyon is one of its side canyons. In addition, its largest volcano -- Olympus Mons -- is larger than any volcano on our planet.