Ashbourne Road in Elkins Park is lined with some amazing homes from Philadelphia’s industrial titans. The one accesible house is The Elkins Estate, designed and built for William L. Elkins, a Philadelphian who made his fortune refining crude oil, and later as a pioneer in the street car and railroad business. The estate consists of 42 acres of land and 16 buildings, including Elstowe Manor, built by Horace Trumbauer. It is private property, but you can visit to see a variety of different performances put on by White Pines Productions (varied, fabulous, and free much of the time). If you go, check out the Chelten House next door, which is also part of the Elkins Estate, and Lynnewood Hall, which is a 110-room Neoclassical Revival mansion on the (now) 36-acre Widneer Estate. Lynnewood has been listed as by the Presrvation Alliance as one of Philly’s most endangered historic properties.