A series of open doorways, once locked, now lead inward into Eastern State Penitentiary, built in 1829.  Shot back on 2-18-2013.  For more information on visiting the historic prison see their web site at: EasternState.org. 

Shot with the Nikon D7000 and Sigma 10-20mm lens @ 14mm.  Aperture priority mode F11, ISO 200, spot metering, exposure bracketed for one set of three frames with 2 stop variance (-2, 0, +2 EV range).  Camera was tripod mounted and shutter triggered with Nikon infrared remote.  Tone map post processing of the exposure brackets done with NIK HDR Efex Pro 2.  Further processing done in Photoshop CS5.