the tallest mountain range is probably the Andes and the depest canyon is probably the contahuasi canyon
The African Great Rift Valley is longest, and the Cotahuasi Canyon is deepest.
the Colorado
The grand crayon
The Yarlung Tsangpo Grand Canyon is among the longest and deepest canyons in the world of Tibet.
Grand canyon
America
Hells canyon.
Earth's Grand Canyon.
The longest canyon in the world is the Cotahuasi Canyon in Peru, measuring approximately 3,535 meters (11,597 feet) deep.
It is an exposed slice into the crust of the earth.
Zion Canyon in Zion National Park is 15 miles long and up to half a mile deep.