I visited Eastern State Penitentiary during a recent trip to Philadelphia. The prison is an eerily impressive structure of preserved ruins, a bare, cold stone structure built in a radial structure around a center point.

Opened in 1829, the building in northern Philly was abandoned in 1971. After almost 150 years of use, the prison now welcomes visitors, tourists and special groups. Some of the cell blocks are currently closed, but you can still walk through many of them to get a glimpse into the life of a convict in solitary confinement.

Here are some black and white photos I took at the prison.

Philadelphia 2017Photos from around Philadelphia, Pennsylvania, USA on Mar. 24, 2017. Photo: Ashley Marshall Philadelphia 2017Photos from around Philadelphia, Pennsylvania, USA on Mar. 24, 2017. Photo: Ashley Marshall Philadelphia 2017Photos from around Philadelphia, Pennsylvania, USA on Mar. 24, 2017. Photo: Ashley Marshall Philadelphia 2017Photos from around Philadelphia, Pennsylvania, USA on Mar. 24, 2017. Photo: Ashley Marshall Philadelphia 2017Photos from around Philadelphia, Pennsylvania, USA on Mar. 24, 2017. Photo: Ashley Marshall Philadelphia 2017Photos from around Philadelphia, Pennsylvania, USA on Mar. 24, 2017. Photo: Ashley Marshall Philadelphia 2017Photos from around Philadelphia, Pennsylvania, USA on Mar. 24, 2017. Photo: Ashley Marshall Philadelphia 2017Photos from around Philadelphia, Pennsylvania, USA on Mar. 24, 2017. Photo: Ashley Marshall Philadelphia 2017Photos from around Philadelphia, Pennsylvania, USA on Mar. 24, 2017. Photo: Ashley Marshall Philadelphia 2017Photos from around Philadelphia, Pennsylvania, USA on Mar. 24, 2017. Photo: Ashley Marshall Philadelphia 2017Photos from around Philadelphia, Pennsylvania, USA on Mar. 24, 2017. Photo: Ashley Marshall Philadelphia 2017Photos from around Philadelphia, Pennsylvania, USA on Mar. 24, 2017. Photo: Ashley Marshall Philadelphia 2017Photos from around Philadelphia, Pennsylvania, USA on Mar. 24, 2017. Photo: Ashley Marshall Philadelphia 2017Photos from around Philadelphia, Pennsylvania, USA on Mar. 24, 2017. Photo: Ashley Marshall Philadelphia 2017Photos from around Philadelphia, Pennsylvania, USA on Mar. 24, 2017. Photo: Ashley Marshall Philadelphia 2017Photos from around Philadelphia, Pennsylvania, USA on Mar. 24, 2017. Photo: Ashley Marshall Philadelphia 2017Photos from around Philadelphia, Pennsylvania, USA on Mar. 24, 2017. Photo: Ashley Marshall Philadelphia 2017Photos from around Philadelphia, Pennsylvania, USA on Mar. 24, 2017. Photo: Ashley Marshall Philadelphia 2017Photos from around Philadelphia, Pennsylvania, USA on Mar. 24, 2017. Photo: Ashley Marshall Philadelphia 2017Photos from around Philadelphia, Pennsylvania, USA on Mar. 24, 2017. Photo: Ashley Marshall Philadelphia 2017Photos from around Philadelphia, Pennsylvania, USA on Mar. 24, 2017. Photo: Ashley Marshall Philadelphia 2017Photos from around Philadelphia, Pennsylvania, USA on Mar. 24, 2017. Photo: Ashley Marshall Philadelphia 2017Photos from around Philadelphia, Pennsylvania, USA on Mar. 24, 2017. Photo: Ashley Marshall Philadelphia 2017Photos from around Philadelphia, Pennsylvania, USA on Mar. 24, 2017. Photo: Ashley Marshall Philadelphia 2017Photos from around Philadelphia, Pennsylvania, USA on Mar. 24, 2017. Photo: Ashley Marshall Philadelphia 2017Photos from around Philadelphia, Pennsylvania, USA on Mar. 24, 2017. Photo: Ashley Marshall Philadelphia 2017Photos from around Philadelphia, Pennsylvania, USA on Mar. 24, 2017. Photo: Ashley Marshall Philadelphia 2017Photos from around Philadelphia, Pennsylvania, USA on Mar. 24, 2017. Photo: Ashley Marshall Philadelphia 2017Photos from around Philadelphia, Pennsylvania, USA on Mar. 24, 2017. Photo: Ashley Marshall Philadelphia 2017Photos from around Philadelphia, Pennsylvania, USA on Mar. 24, 2017. Photo: Ashley Marshall