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

A storybook European village in Berkeley.

The largest drain hole in the world.

Quite simply the largest tree in the world (by volume).

One of the most scenic stretches of road in America winds between some of the country's oldest trees.

Standing in a state of "arrested decay," this ghost town allows for a detailed peek into Gold Rush life in an unusually harsh climate.

Olfactory delights in San Francisco's Botanical Gardens.

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

A hotel and restaurant serving as the mecca of kitsch.

Under the right circumstances, this waterfall in Yosemite briefly turns a luminescent fiery orange.

A 140-year-old castle with underground caves hidden in San Francisco.

A trash dump made beautiful by nature's power.

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

France's most famous cemetery, with some of its most curious tombs.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

A bronze statue dating back as far as 1252, still has remnants of gold on its right cheek from ancient gilding.

The world's longest outdoor covered escalator system transports commuters through Hong Kong's hilly terrain.

This tipsy office building in downtown Prague was originally called “Fred and Ginger.”

Macabre astrological automaton clock dating to the late 1400s.

Synagogue built from the stones of Solomon's temple contains the golem of Prague.

Around 100,000 bodies are buried below the medieval headstones, many of which mark graves with multiple bodies stacked up to 12 deep.

Tropical paradise strewn with hundreds of World War II wrecks.

The ruins of an ancient island city built atop a coral reef in the South Pacific are spectacular and strange enough to have inspired H.P. Lovecraft.

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