Chimborazo is over 20,000 feet high. At high altitudes, you are often above the clouds that form in the lower layers of the atmosphere. So when you look down, it feels like you are "walking" on them.

Chimborazo is the furthest point from the center of the Earth, further than Everest. This is due to the elliptical shape of the Earth, which is widest at the equatorial region.