Penshaw Monument was created in 1844.
No-one has ever found evidence to support the "monument ghost" but on wikipedia there is a history section that says a 15 year-old boy was pushed from the roof.
Tyne bridge, angel of the north, the millennium bridge, penshaw monument, Durham cathedral, the f pit and the swing bridge. 
Petroglyph National Monument was created in 1990.
Wallace Monument was created in 1869.
Lansdowne Monument was created in 1845.
Monument Mills was created in 1851.
Monument to Nicholas I was created in 1859.
The Monument of Matrones was created in 1582.
Tabb Monument was created in 1936.
Ames Monument was created in 1880.
Monument of the Republic was created in 1928.
Signers Monument was created in 1848.