This is California Registered Historical Landmark No. 939. These folk art sculptures were created by John Ehn, who was born in 1897, over a 30-year period that ended with his death in 1981. The oversized figures and humorous tombstones were intended to create a vision of the mythological Old West. 
Originally located at a motel in
A plaque dated 1969 identifies this as Alvin Cleveland Park. Most people on campus (including employees) don't even know it exists. It's a cute, quiet mini-park, well shaded, with picnic tables, paved paths, and a water fountain. The day I visited, one table was occupied by a young woman peacefully studying.