Ice cream cone formation, 100th anniversary 1871-1971
Summary
Famous Crystal Cave, Pennsylvania, Natural Bridge. This great natural underground wonder discovered 1871, is located midway between Allentown and Reading, just a short distance from US. #222 or #22-#78. Oldest operating cavern in eastern United States.
Courtesy of Boston Public Library
Tags
Date
1930 - 1945
Source
Boston Public Library
Copyright info
Public Domain