The ghost town left by the worst nuclear disaster of all time is being taken over by nature and urban explorers.

An eerie, derelict amusement park in Berlin.

This 19th-century island fort built to protect against an invasion by sea.

While not Turkey's deepest underground city, this subterranean redoubt is the largest.

This ancient subterranean megalopolis is known for the hot oil traps that were installed above each of its entrances.

Live a night as a Byzantine King, with a minibar and private jacuzzi.

The deepest underground city in Turkey was designed to protect 20,000 people behind massive stone doors.

In this historic region, homes and churches are carved into ancient volcanic rock formations.

The cobbled together compound of a deceased artist which now serves as a filming location.

This California estate was either haunted by ghosts or the Marx brothers.

At night, this glittering musical tunnel draws skaters and photographers.

It is locally loved and ridiculed for literally looking like poop.

The largest permanent Monopoly board makes one of the longest games even bigger.

Historical trolley restoration and operation at History San Jose, Kelly Park.

The headquarters of a secretive order is also a beautifully-designed park.

If you are looking for a used Russian battery, Chinese Ham Radio or other electronic oddities this Flea Market is a good place to start.

Hidden among the multi-million dollar mansions in the Santa Cruz hills is a sanctuary for troubled birds.

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

A pair of pure white felines guard the entrance to a spot of California real estate established as an artist's haven.

Once close to extinction, there is no shortage of elephant seals on the beaches of Año Nuevo State Park.

An ominous concrete cube cuts a dystopian silhouette atop this California mountain.

A "gravitational anomaly" located in the redwood forests just outside of Santa Cruz, California.

A strange house built only at night, with rumored mystic inspiration.

Rising out of miles of farmland, these buttes are sometimes called the world's smallest mountain range.