11/12/2010 04:41 pm ET Updated May 25, 2011

11 Incredible Mud Structures (PHOTOS)

Didn't you love to play with mud and clay when you were a kid? It was so wonderfully pliable, so sturdy when it dried, you felt like a creator in your own right.

Mud, the most basic of building materials, was used by mankind for thousands of years to construct homes and citadels. Though it's been superseded today by more complex materials, these 11 amazing mud structures, some so ancient that their age is unknown, are a testament to earth's incredible resilience.

11 Incredible Mud Structures