The address of the Friends Of Hopewell Furnace National Historic Site is: 2 Mark Bird Lane, Elverson, PA 19520
Dennis C Kurjack has written: 'Hopewell Village National Historic Site, Pennsylvania' -- subject(s): Iron industry and trade, Hopewell Village National Historic Site
The area of Hopewell Furnace National Historic Site is 3,431,734.2461952 square meters.
Hopewell Furnace National Historic Site was created on 1938-08-03.
Pennsylvania Avenue National Historic Site was created on 1965-09-30.
The area of Pennsylvania Avenue National Historic Site is 83,365.24230144001 square meters.
The address of the National Railway Historic Society is: 100 N 20Th St Ste 400, Philadelphia, PA 19103-1462
Hopewell Culture National Historical Park was created on 1923-03-02.
The area of Hopewell Culture National Historical Park is 4,734,822.014208 square meters.
The address of the Johnstown Flood National Memorial is: Historic Pl, Saint Michael, PA 15951
Allegheny National ForestBrandywine BattlefieldConneaut LakeDelaware Water Gap National Recreation AreaFort Necessity National BattlefieldGettysburgHersheyHopewell Furnace National Historic SiteIndependence HallKennywoodLeonard Harrison State ParkLongwood GardensMount PoconoPhiladelphiaPittsburghPresque Island State ParkValley Forge National Historical ParkWashington Crossing Historic Park
"The National Park Service currently manages 391 sites in the U.S. and its territories. 74 of these sites are classified as National Monuments." Technically, this doesn't answer the above question at all. Only the Cable Cars in San Francisco are considered a mobile national monument. But, again, technically, they aren't a monument. Instead, they are recognized as a national historic landmark.
National Historic Landmark was created in 1960.