Nestled in the heart of San Francisco’s bustling Financial District stands a unique homage to the Mayan and Beaux Arts.

The old Niles Canyon Aqueduct in the San Francisco Bay Area is a bemusing and secret trail through nature for wayward travelers.

A man-made island in scenic San Francisco Bay.

Furniture tries to escape an abandoned building in San Francisco.

A monument to the love people have for their pets.

Big gun installations, built over a massive cemetery, now abandoned & hidden in trees.

The seawater playground of gilded-era San Francisco burned to the ground in 1966.

A winding path built in secret on the edge of the continent.

The massive cave church of Cairo's Zabbaleen community is one of the largest Christian churches in the Middle East.

Aqueducts have dramatically changed this old lake, now home to tufa towers and its very own species of tiny brine shrimp.

An underground mansion with fruit-bearing trees and grapes growing beneath the surface of central California.

A darkly erotic open-air statuary in Catalonia.

An eccentric garden of sculptures crafted in India decorate an Irish green space dedicated to Alan Turing.

Ugly 18th-century dwarf statues living in a perfectly landscaped Austrian garden.