This derelict superstructure was a very important warning system for the Soviet military.

In a city that boasts four separate inclined cable railways, this is one of the busiest funicular lines in the world.

Dug as a secret royal escape route, the tunnel became a wartime bomb shelter and dumping ground for vintage cars.

The prison where Hitler wrote "Mein Kampf," and 278 Nazis were later executed for war crimes.

The site of an underground detonation of a megaton nuclear bomb in the middle of the Mojave Desert.

A historic and oft-filmed prison stands in a Chicago suburb.

A stairway to heaven, or to nowhere at all.

This memorial to the victims of the Romanian Revolution of 1989 is often compared to a potato on a skewer.

This newly renovated Soviet-era outdoor exhibition center is bigger than the principality of Monaco.

The gorgeous entrances into the city's underbelly look more like grand halls than subway stops.

Perhaps the tiniest sculpture in Saint Petersburg is a little bronze finch inspired by a song.

A 250-year-old timepiece-automaton adorned with golden mechanical birds, which still sing to this day.

Palace where the nearly un-killable Rasputin was murdered.

An ever-growing literary collection housed in the apartment where the Russian author penned his final novel.

Hindu temple of the dead home to hundreds of long-tailed macaques.

A sprawling nature preserve harbors the world's only living dragons.

This $62 million dollar temple was erected to house one little dental fragment of religious history.

Singapore's landscaping project is home to 18 incredible Supertrees.

A tall karst islet popularized by 007.

A white Buddhist temple with a golden restroom.

Once a year, thousands of naked cyclists flood the streets of a Seattle neighborhood.

A 100-year-old purveyor of curiosities, curios, and kitsch featuring mummies, shrunken heads, and a Fiji Mermaid.

This massive store is home to an eccentric collection of vintage, retro, and peculiar goods.

The possible imprisonment of Vlad the Impaler here earned the medieval castle its nickname, "Dracula's Castle."