Balancing boulders that teeter precariously on spires of rock, rolling waves of sandstone with perfectly colored stripes (like The Wave in Arizona, pictured), weathered mountains carved into animal shapes. These are all examples of amazing rock formations that look like they were created by human hands. But they weren't. They're all completely natural, most are ancient and visitors flock to them each year armed with cameras and a tremendous sense of awe.
Here are 13 rock formations created by Mother Nature that may be worth a visit — even if that visit is just a digital one.