Now That’s Incredible

It’s 14 miles (22 km) high and 388 miles (624 km) wide. It’s almost three
times higher than Mount Everest, and wide enough to cover Arizona. The
city of London would easily fit inside the crater at the top.
However, because of its wide base, climbing to the top of Olympus Mons –
while tiresome – wouldn’t require any mountaineering experience.