The remnant of a volcano off the coast of Australia, Ball's Pyramid is a giant spiky death triangle that in no way resembles a ball, and which no sane person should want anything to do with. First summited in 1965, it took a whopping 17 years before Australia finally said "Hey, let's maybe keep people off the dangerous spike island so they don't die."*
There's a tiny flat spot at the back end of this island of doom which is typically where people land before scaling the very thin ridge to the top. Of course, in true Australian fashion, the climb is the least terrifying part of this godforsaken spike -- it's the bugs.
Rick Hammond/Zoos Victoria
If it bites you, you turn into the Amazing f*****g-Nightmare-Man.