Located on NM Hwy. 485, just north of the hamlet of Gilman, the Gilman tunnels were originally blasted out of the rock in the 1920's for a logging railroad and are quite high. There are several spectacular turnouts on the short climb. Logging ruins can still be found above the road on Peggy Mesa. There are great views of the Guadalupita and Virgin mesas. There are numerous and several large ruins on the tops of these mesas.