Westerlo and East Berne serve as the primary hubs in this part of the Helderberg Mountains, where the landscape is defined by a series of prominent elevations like Irish Hill, Cole Hill, and Wolf Hill. The region's drainage pattern is dominated by the Switz Kill, Fox Cr, and Basic Cr, which cut through the uplands to feed several notable bodies of water, including Warner Lake and Onderdonk Lake. The settlement pattern follows these watercourses and ridgelines, with small communities like Reidsville and Dunbar Hollow connected by a network of rural roads such as Switzkill Rd and Albany Hill Rd. Local history is preserved in several small burying grounds, including Snyder Cem and Reidsville Cem, while the area's modern connectivity is illustrated by the presence of small private flight strips like the Westerlo Airport and Heldeberg Airstrip.
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1893 · Coxsackie
USGS Topo · 1:62,500
1893 · Durham
USGS Topo · 1:62,500
1893 · Albany
USGS Topo · 1:62,500
1894 · Coxsackie
USGS Topo · 1:62,500
1894 · Durham
USGS Topo · 1:62,500
1895 · Albany
USGS Topo · 1:62,500
1898 · Albany
USGS Topo · 1:62,500
1900 · Berne
USGS Topo · 1:62,500
1903 · Berne
USGS Topo · 1:62,500
1927 · Albany
USGS Topo · 1:62,500