Olympus Mons - Mars Volcano Mountain and Rheasilvia on 4Vesta
Did you know that Olympus Mons is the tallest mountain in our solar system. It is 2-1/2 times higher than Mount Everest is above sea level and has a height of over 72,000 feet. It is tied with Rheasilvia on the asteroid 4 Vesta as the tallest mountain currently discovered in the Solar System. (Rheasilvia is a crater and was likely created by an asteroid impact which has a central peak that rises 14 miles above the lowest measured part of the crater floor and the highest measured part of the crater rim is 19 miles above the crater floor low point).