Well here is one of the markers. This one viewed from the Pennsylvania side (so it shows "Maryland"). If you've not heard of the Mason Dixon Line, it was a surveying project that was commissioned by the American Colonies to have a couple surveyors from England (Charles Mason and Jeremiah Dixon) come and mark a line along the 40th parallel between 1763 and 1767 that now denotes most of the border between the states of Pennsylvania and Maryland in the USA. The vulture above it (best identified by its dihedrals) is an example of the rapid expansion of the vulture population in the USA brought on (IMHO) by the overabundance of white-tailed deer that are constantly being hit and killed on our highways (the deer create a wonderful food-source for the vultures). This image taken with an E-PL5 and Oly 12-50 kit lens using f/22 and 1/640 second at 50mm and ISO3200 (just happened to be set there).