12 of the world's most awe-inspiring canyons and craters

Earth's surface is far from perfect. Deep cracks and enormous basins mark the landscapes of every continent — but these flaws make for some of the most spectacular sights on the planet, like the Negev's Ramon Crater in Israel shown to the left. Enduring thousands of years, these landmarks have been shaped by wind, lava and even asteroids to become the epic formations they are today.