Provides an historical perspective on the now-abandoned mining town best known for an underground coal fire that has raged for 4 decades.

Exploring Haverford State Hospital located in suburban Philadelphia.

A collaboration of information based on personal interviews, archival research, material found inside the buildings, and thorough exploration of the buildings themselves. Pennsylvania.

Meetup group dedicated to preserving the history of the Philadelphia area through urban exploration.

Information and links related to Byberry Mental Hospital. Pennsylvania.

Site about the Philadelphia State Hospital (Byberry). Pictures of the inside and out, with a map and video footage of the inside. Many links to other sites of the same nature.

Features explorations around the Philadelphia area, with visits to the Byberry Asylum, Lambertville School, and several other abandoned military and industrial buildings. Includes tips for beginners and photos.

An urban exploration website dedicated to the photo documentation of urban ruins. Based in western Pennsylvania.

Forum for urban exploration and photography in the Erie, PA region.

Exploring all around Pennsylvania. Picture album.