Here is a directory of National Conservation Lands maintained by the U.S. Bureau of Land Management http://www.blm.gov/wo/st/en/prog/nlcs.html http://www.blm.go

Here is a directory of National Conservation Lands maintained by the U.S. Bureau of Land Management http://www.blm.gov/wo/st/en/prog/nlcs.html http://www.blm.gov/wo/st/en/prog/nlcs.html (I didn't find a way to search by features, like presence of ruins). Edit: I found another page with a helpful written overview of the National Conservation Lands http://www.blm.gov/wo/st/en/prog/blm_special_areas/NLCS.html http://www.blm.gov/wo/st/en/prog/blm_special_areas/NLCS.html