The 87 million year old, world-famous Monument Rocks. The first natural landmark in the nation chosen by the US Department of the Interior as a National Natural Landmark http://tinyurl.com/kacqn , this Stonehenge-like cluster of 70-foot-tall outcroppings of wind-and-rain-carved, calcium carbonate/shale badlands, spread out over several acres, juts majestically from the flat, cactus and yucca-studded buffalo grass prairie, looking like some kind of eerie, ancient ruins as you approach them from a distance over the dusty back roads and the green, misty valleys and canyons of the scenic Smoky Hills. Read more here.

 

Thanks to my friend D. Parkinson for this description!