Map Lovers’ Monday: Topography of Philadelphia from 1863
Sandy Run Watershed and the Holmesburg Water Works
Birch’s Views of Philadelphia, 1800
Map Lover’s Monday: Fairmount Park, 1869
Roberts Mill, Wingohocking Creek, 1871
Map of Historic Dock Creek
The Discovery Center: The creative reuse of an abandoned city reservoir
Wingohocking Sewer outfall into Frankford Creek
Plans and maps of the Pennypack Creek Watershed in Philadelphia
Models of Change
