Another Google map, this one showing various points of interest along old Pittsburgh lines. Stations, coaling towers, yards, roundhouses, interlocking towers, etc. https://www.google.com/maps/d/viewer?mid=1Mruyg0V6Pj-iFzs3mxgMrTdkXtA&ie=UTF8&oe=UTF8&msa=0&ll=40.385366432869375%2C-79.74792613830124&z=9