Contra Costa County, California
Alvarado Park (Park)
[Map · Street View] Jct. of Marin and Park Aves., Richmond, CaliforniaAlso known as: Grand Canyon Park, CA-CCO-553H
Moraga Adobe (House)
[Map] 24 Adobe Lane, Orinda, CaliforniaAlso known as: Moraga,Joaquin Adobe
Mount Diablo (Natural feature)
Initial Point for Northern California & Nevada Land Surveys
Mount Diablo Coal Field (Mine)
Black Diamond Mines Regional Park, from State Hwy 4 take Somersville Rd 3.9 mi S, Antioch, CA
Shadelands Ranch House (House)
[Map] 2660 Ygnacio Valley Rd., Walnut Creek, CaliforniaAlso known as: Shadelands Ranch Historical Museum
Tao House (House)
[Map] 1.5 mi. W of Danville, Danville, CaliforniaAlso known as: Eugene O'Neill House
Tucker House (House)
[Map] 110 Escobar St., Martinez, CaliforniaAlso known as: Franklin Glass Home, Martinez Historical Society Marker # 8
Winehaven (District)
[Map] Point Molate, Richmond, CaliforniaAlso known as: Point Molate, Fuel Department, NSCO