Oh, wow. Gotta be careful here. I've never tread on virgin territory before.
Guess I'll take the honor of the first post here with one of
Olympus Mons. Not just the largest volcano on Mars, one of the largest in the solar system. At over 15 miles high, 340 miles in diameter and sitting on a 4 mile high
scarp, it dwarfs 6 mile high Mauna Loa.
artist conception of a dust storm rolling down the flanks.
cool, was able too add one more image before the edit window closed...