Gypsum formation. (No. 8).
Lower passage opening into "Cleveland's cabinet."
On Echo River, [showing men with lamp in boat]
Entrance to "Gothic Avenue."
Martha Washington's Statue"
Heaps of lixiviated earth.
Old Saltpeter Pipes. (1812)
First Saltpeter Vats. (1812)
Entrance from a distance.
Rosa's Bower [with gypsum formations in the shape of flowers].
Rosa's Bower [with gypsum formations in the shape of flowers].
Rosa's Bower [with gypsum formations in the shape of flowers].
Rosa's Bower [with gypsum formations in the shape of flowers].