Devil's Doorway, from above, Devil's Lake, Wis.
Card Basket, Dells of the Wisconsin River.
Natural Bridge, Sauk County, Wis.
Hanging Stone or Natural Bridge in Ravine, near Brandon House, Greenwood Lake.
Crystal arch, Nantasket Beach, Mass. Winter of 1875.
The Great Natural Bridge, Santa Cruz, Cal. U.S.A.