Escher's Embarcadero
San Francisco, California
In this intriguing image captured at San Francisco's Embarcadero, circular staircases spiral both away from and towards us, creating an optical illusion reminiscent of M.C. Escher's mind-bending art. At the center of this enigmatic scene, a spherical orb adds an extra layer of curiosity to the urban labyrinth. Photo © copyright by Rich Voninski.