Fort Churchill State Historic Park is a state park of Nevada that preserves the remains of a United States Army fort and a way station on the Pony Express and Central Overland Routes dating back to the 1860s. The site is one end of the historic Fort Churchill and Sand Springs Toll Road.  Fort Churchill was designated a National Historic Landmark in 1961.

More info here: https://en.wikipedia.org/wiki/Fort_Churchill_State_Historic_Park