Former villa and estate of James Deering developed to preserve native tropical forests.

A perfect circle of 24 mysterious holes dates back to prehistoric times.

Founded by members of the Tohono O’odham Nation, this one-room joint's James Beard–winning fry bread is light as a cloud.

A volcanic cone that formed over 600 years ago.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

One of the last remaining World War II Victory Gardens in the U.S. is quietly growing across from Fenway Park.

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

These delicate buggers are some of the rarest fossils that have bubbled up from the Tar Pits.

This abandoned boat was left in place thanks to its rotting beauty.

Dublin's "Dead Zoo" serves as a window to Victorian museum design.

Enormous pendulum helps keep Taiwan's tallest building from swaying.

This Oakland fairytale kingdom, fiercely devoted to childlike whimsy, was an early inspiration for Disneyland.

Olfactory delights in San Francisco's Botanical Gardens.

This concrete tangle of square pipes has stood as a proud thorn in the city's side since the '70s.

Prone to disastrous fires, the city of San Francisco has the Guardian, a fireboat gifted by residents, to watch over them from the bay.

Shoot for par over the bodies of the dead on this cemetery-cum-golf course.

A classically inspired temple in Redwood City.

A lovers' beach, tucked below the surface of the island, provides a safe haven for romance.

Two geological phenomena in one precarious locale: a towering stone window, and a deep blue void.

The last remaining relic of San Francisco's glittering 1915 Panama Pacific Exposition.

A 16th-century horror show built in a lovely Italian garden.

This subterranean necropolis holds three floors of antler-dug grave caves.

An unassuming grey box sitting on San Francisco's Pier 17 is a "sky diary" of the coastal city's temperamental weather.

A modern mechanical planetary system, part of a 10,000 year clock.