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

A burnt orange monolithic dome structure perched on a hillside near Interstate 280.

A giant chess set, minus the psychedelic drug trip.

This giant shopping mall still holds signs of its automotive past.

From the Difference Engine to the Cray-1, all under one roof.

A trading post in the North Pole where children send letters.

Four-story concrete hotel never opened to customers.

A Swedenborgian glass church surrounded by redwoods sits perched atop a massive landslide area.

Remants of foundations, streets, and streetcar tracks inhabit the cliffs where a landslide occurred in 1929.

Megachurch turned Catholic church comprised of 10,000 glass panes.