I Conquered Everest T-shirt - Mount Everest
Now here's a funny thing. We all know that Mount Everest is the World's highest mountain at 8,848 M / 29,029 feet. However because the Earth is an oblate spheroid (meaning that it's wider at the Equator than at the North and South Poles) the summit of the Chimborazo Volcano in Ecuador is actually further away from the centre of The Earth than the summit of Everest is. Strange but true.
It'd be pretty cool to climb Mount Everest (actually it'd be pretty cold, as average temperatures at the summit range from -20 degrees C to -35 degrees C) but if you don't fancy it you can always get yourself this retro-styled t-shirt instead.