A B&B on a Victorian lighthouse station in San Francisco Bay.

A living time capsule of the 1960s Richardson Bay water-front.

An abandoned, unfinished mansion on grounds strewn with lava rocks.

Dive bar built out of the remains of a whaling ship.

A replica that won't float away.

Largest collection of mounted dinosaur specimens in the world.

A 90-foot-tall psychedelic "tree" on the side of the highway has baffled passersby for decades.

Curiously, this large sporting goods store features 14 wax representations of American presidents.

Stroll through a wonderland of stupendous moss-covered trees.

The abandoned zoo enclosures offer a perfect place to experience the other side of the bars.

One of the oldest reform schools in the United States, home to wayward boys such as Merle Haggard, now abandoned.

Despite being a perfectly pleasant place to be, Loyalton can't seem to attract any visitors.

The now-abandoned tunnels were built for the transcontinental railroad on the route where the first wagon train entered California.

The smallest country in the world.

Beneath a Virginia City bar is the entrance to an abandoned gold mine.

Historic home to one of the most famous women pioneers of the 19th century.

Where there's quartz, there must be gold. Thus is the story of the mines of Julian, and the titillating times of the Gold Rush.

Ship-sized kinetic sculptural fantasy.

A famous burial ground with a history both grim and literary.

The largest of London's subterranean rivers and once a mad, bad center of London life.

This landmark church concealed a crypt packed with bones that was discovered thanks to the London Blitz.

A narrow passage next to a cafe leads to a courtyard exploding with murals, tags, and paste-ups.

A traditional U-Bahn station in Berlin gets a string of rather untraditional benches.

A 12th-century fortress containing some of Berlin's oldest buildings.