Perkiomen Creek and its various branches, including the W Br Perkiomen Cr, carve through this section of the Pennsylvania countryside where Berks, Lehigh, and Montgomery Counties meet. The landscape is dotted with small, historic hamlets such as Seisholtzville, Harlem, and Sigmund, many of which developed around early industry indicated by landmarks like Furnace Hill. This 2016 survey illustrates a mix of traditional agricultural land and modern recreational sites, including the Butter Valley Golf Port Airport and the Bally Community Swimming Pool. Genealogists will find a high density of burial sites reflecting the area's religious heritage, from the Washington Schwenkfelder Cem to the Salem Evangelical Cem. The southeastern corner transitions into more established residential hubs near East Greenville and Pennsburg, where the waters eventually flow toward the Green Lane Reservoir.
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1888 · Quakertown
USGS Topo · 1:62,500
1890 · Quakertown
USGS Topo · 1:62,500
1894 · Allentown
USGS Topo · 1:62,500
1894 · Quakertown
USGS Topo · 1:62,500
1902 · Boyertown
USGS Topo · 1:62,500
1902 · Slatington
USGS Topo · 1:62,500
1937 · Allentown West
USGS Topo · 1:48,000
1939 · Allentown
USGS Topo · 1:62,500
1942 · Norristown
USGS Topo · 1:125,000
1942 · Allentown West
USGS Topo · 1:62,500