This historic little railroad runs through some of the most beautiful scenery in Germany.

A throwback train ride transports passengers through one of the lesser-known national parks in the country.

Ride in 1960s style on the private luxury train Marshal Josip Tito used to travel around Yugoslavia.

The oldest operating steam locomotive in Canada runs along this heritage railway.

The last Tsar of Russia constructed this private church just so he could attend services when visiting his wife's hometown.

The silent film master's legacy commemorated in all the right and wrong places.

An engineering error ensured this cavernous 350-foot-long subterranean thoroughfare was never used as intended.

This site is both a remarkable reminder of the town's mining history and a fantastic government blooper.

The two-cell building in Nebraska was briefly owned by a teenage boy and then a Hollywood dummy.

A geothermal energy project gone wrong is fracturing the city's picturesque architecture.

A measuring mishap led to these artificial stone ladies losing their stomachs.

A collision of human error and natural geothermal pressure created this rainbow-colored geologic wonder.

An ancient burial ground believed to have been used for ritual sacrifice.

A meandering boardwalk across the bogland leads to a "stairway to heaven" with sublime views.

This haunted hotel built on natural springs once served as a hospital for a quack doctor promising a cure for cancer.

This Turkish cave boasts some rather bizarre associations with the King of Mount Olympus.

This sacred, circular cave is lined with pools so clear and still that it's hard to tell where the water begins.

You can row a boat through this ancient underground reservoir.

A magical oasis in the middle of the Negev Desert.

Take a dip beneath the stalactites in this amazing cenote.

The narrowest house in America is seven feet of pure spite.

A preserve with 75,000 ancient drawings remains the realm of public – not just scientific – exploration.

The walls and streets of the ancient city are peppered with penises.

The Victorian-era greenhouse is stuffed with tropical plants, and open 365 days a year.