Stairs ascend a hill at Lands End near the Sutro Baths ruins in San Francisco.
Stairs in a parking garage at a Plano, Texas, office complex.
A conglomeration of stairways at Alcatraz Federal Penitentiary, San Francisco.
An old staircase leads from the beach near the Sutro Baths ruins at San Francisco’s Lands End.
A maintenance stairway wraps around a support column for the Skylink train at DFW International Airport, Texas.
An elaborate ramp weaves it way to a small utility building at theFort Worth Nature Center & Refuge, Texas.
A spiral staircase in the cell block at Alcatraz Federal Penitentiary, San Francisco.