Their sheer cliffs and waterfalls (including Angel Falls, which is the highest waterfall in the world, at 1,002 metres (3,287 ft)) create spectacular landscapes. The most famous tepuis in the park are Mount Roraima, the tallest and easiest to climb, and Auyantepui, the site of Angel Falls. The tepuis are sandstone and date back to a time when South America and Africa were part of a super-continent.