What's the Biggest Canyon on Earth Posted: March 12, 2025 | Last updated: March 12, 2025 Last time we learned about Mars' great Valles Marineris, the largest canyon in the solar system.

making it the largest canyon in Africa and the second largest in the world after the Grand Canyon of the USA. It is a popular tourist attraction and a fantastic place for hikers and outdoor ...

As the second-largest canyon in the United States, stretching approximately 120 miles long and 20 miles wide, this Texas treasure offers awe-inspiring views, diverse ecosystems and a peaceful retreat.