Rockwoods Reservation, in far western St. Louis County, used to be the site of intensive limestone quarrying for the creation of lime. The mine is now closed off from visitors, but you can still get a sense of the massiveness of the mine from the large holes in the side of the bedrock.
The bedrock lies very close to the surface, as can be seen below where trees are clinging precariously to the hillside.
Discarded stones lie on the path on the way to the quarry.
