Mars has a canyon larger than Earth's Grand Canyon
Mars' Valles Marineris is the solar system's largest canyon, stretching over 4,000 kilometers and revealing ancient geological secrets far grander than any on Earth.
Valles Marineris, the solar system's largest canyon, stretches over 4,000 kilometers along Mars' equator. Discovered in 1971 by Mariner 9, this colossal feature is up to 600 kilometers wide and 7 kilometers deep, dwarfing Earth's Grand Canyon. It spans roughly one-fifth of the Martian circumference, from west to east.
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