While hiking on the high mesa on Island in the Sky District in Canyonlands National Park at 6300 feet, we hiked a short trail (1.5 miles) to Aztec Butte.   On top of this butte, but under a cliff overhang was a Puebloan granary, hundreds of years old, but still standing.

Ancestral Puebloan people hauled their seeds and grain in woven baskets up to these stone structures which they sealed in mud.   Clad in sandals made of yucca fibre, their climb from the banks of the rivers far below was about 2000 feet in elevation and at least 8-10 miles each way.   We looked inside two of these structures and noted that they were dry inside with a sandy-rocky floor. 

Below us the cliffs dropped away into twisting canyons on their way down to the Colorado or Green Rivers.  Another special spot to explore in Canyonlands.