Henry Mercer, an archeologist, explorer and collector, was born in Bucks County, PA in 1856 and resided in Doylestown, PA until his death in 1930. Fonthill, a concrete mansion he began building in 1908 and completed two years later. Modeled to look like a castle, the mansion is now open for tours and provides a peek into his amazing life. The mansion has been designated a National Historic Landmark. They were celebrating his 150th birthday, chosed not to pay to go inside, instead roamed the grounds and admired this fabulous home.