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Monolith with bull, fox, and crane in low relief at Göbekli Tepe. The density of most stone is between 2 and 3 tons per cubic meter. Basalt weighs about 2.8 to 3.0 tons per cubic meter; granite averages about 2.75 metric tons per cubic meter; limestone, 2.7 metric tons per cubic meter; sandstone or marble, 2.5 tons per cubic meter.
Three of these sites are shared with other states and are credited by the National Park Service as being located in those other states: the Delaware and Hudson Canal (centered in New York but extending into Pennsylvania); the Beginning Point of the U.S. Public Land Survey (on the Ohio–Pennsylvania border); and the Minisink Archeological Site ...
The following are approximate tallies of current listings in Pennsylvania on the National Register of Historic Places.These counts are based on entries in the National Register Information Database as of April 24, 2008 [2] and new weekly listings posted since then on the National Register of Historic Places web site. [3]
A city style marker in Philadelphia, the state's largest city Clickable map of Pennsylvania counties. This is a list of Pennsylvania State Historical Markers which were first placed by the Commonwealth of Pennsylvania in 1914 and are currently overseen by the Pennsylvania Historical and Museum Commission (PHMC) as part of its Historical Markers Program.
This is intended to be a complete list of the properties and districts on the National Register of Historic Places in Erie County, Pennsylvania, United States. The locations of National Register properties and districts for which the latitude and longitude coordinates are included below, may be seen in a map. [1]
This is intended to be a complete list of the properties and districts on the National Register of Historic Places in Franklin County, Pennsylvania, United States. The locations of National Register properties and districts for which the latitude and longitude coordinates are included below, may be seen in a map. [1]
This is a list of Native American archaeological sites on the National Register of Historic Places in Pennsylvania.. Historic sites in the United States qualify to be listed on the National Register of Historic Places by passing one or more of four different criteria; Criterion D permits the inclusion of proven and potential archaeological sites. [1]
[1] [2] Before its destruction, it was one of the largest megalithic monuments in Europe. [1] As it survives today, the site comprises a rough and highly damaged avenue of stones arranged over a mile, aligned northwest. At its southern end is the avenue's terminal, a stone circle named 'Kemp Howe', which has been mostly buried by a rail embankment.