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Camp William Penn Marker
William Penn High School
William Penn Highway
William Penn Highway
Site of William Penn Cavern
Camp William Penn Marker (Full View)
Juniata River and William Penn Highway
Little Juniata River, original William Penn Highway
Little Juniata and Old William Penn Highway
Little Juniata and William Penn Highway
Tunnel connecting quarries either side of William Penn Highway
Basalt dike (?)
Basalt dike (?)
Close folding, Catskill strata
Close folding, Catskill strata
Dripstone in Hi-wa-may Cavern
Entrance Hi-wa-may Cavern
Faults in Martinsburg shale quarry near Bethel
Looking over Huntingdon (reformatory at right)
Rock structure