Rockhouse Cliffs Rockshelters in Perry County, Indiana, preserve an unusually long record of human presence in a remote Hoosier National Forest setting. These two prehistoric shelters may have been used for more than 10,000 years, from the Early Archaic period into the twentieth century, helped by nearby water and difficult terrain that protected the site. Artifacts, including Elk River Stemmed projectile points linked to sites in Alabama and Kentucky, give the shelters significance beyond southern Indiana. After informal digging in the 1930s and formal recording in 1953, the site gained recognition for its rarity and preservation and was listed on the National Register of Historic Places in 1986.