10 delicately balanced rocks that defy gravity

Mushroom Rock State Park, USA
Rock on
© John Elk III/Lonely Planet Images
Located in the Smoky Hills region of north-central Kansas, this park is noted for its mushroom-like rock formations, also a kind of hoodoo. While naturally a source of interest for geologists, you don't need to be a rock specialist to gaze and question: are these really formed naturally, or are they the work of another life force?