Olympus Mons on Mars, the tallest known mountain in the solar system, is so large at its base that an observer on its peak wouldn’t know he was standing on a mountain because its slope would be obscured by the curvature of the planet itself.
fact
Olympus Mons on Mars, the tallest known mountain in the solar system, is so large at its base that an observer on its peak wouldn’t know he was standing on a mountain because its slope would be obscured by the curvature of the planet itself.