If you want to learn more about the history of photography, head here. The place is decorated in Victorian style and offers guided tours.
Adults: $10 Students and Senior Citizens (65): $8 Children (up to 12): Free
Official website http://www.photoantiquities.org/
Address 531 East Ohio Street, Pittsburgh, Pennsylvania 15212, USA
Coordinates 40°27'22.68" N -80°0'0.72" E