O'Brien's district contains such Philadelphia landmarks as Independence Hall (United States), the Liberty Bell, South Street, and Penn Treaty Park.
Plants under that name were raised at the Morris Arboretum, Pennsylvania, Philadelphia, from grafts made in 1945 from a tree at Haverford College, itself a graft from the Shackamaxon Treaty Elm (felled by a storm in 1810) in what was later named Penn Treaty Park, Kensington, Pa.
National Park Service | Hyde Park | Central Park | South Park | Yellowstone National Park | Hyde Park, London | William Penn | Albert Park | Treaty of Versailles | Phoenix Park | Sean Penn | Longstock Park | Bletchley Park | Yosemite National Park | Victoria Park | Linkin Park | Belmont Park | Jurassic Park (film) | Queens Park Rangers F.C. | Highland Park | Dalymount Park | Golden Gate Park | University Park, Pennsylvania | Park Avenue | Donington Park | Overland Park, Kansas | Buena Park, California | amusement park | Albert Park, Victoria | park |