Donner Lake, Tunnels No. 7 and 8 from Summit Tunnel, eastern summit in distance
East portal of summit tunnel. Western summit. Length 1,660 feet
Section of Penn. R. R. tunnel under the Hudson River at N. Y. City, exhibited at World's Fair, St. Louis, Mo., 1904. Diameter 21 feet
Bend of the Weber, Upper Weber Kanyon, near Tunnel No. Three, looking east.
Bend of the Weber, Upper Weber Kanyon, near Tunnel no. Three looking, east.
Tunnel No. 3, Weber Canon. U.P.R.R.
Tunnel No. 3, Weber [River].
Tunnel No. 3 and Weber River.
Tunnel near Devil's Gate.
Black Rock Tunnel, near Phoenixville.
Railroad tunnel and tracks through mountain.
The entrance of the Shawangunk Tunnel, on the east side.
The entrance of the Shawangunk Tunnel, on the west side.