This 14th century castle withstood years of battle but is now sliding off the hills into the Danube.

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

The tragic reality of a town riddled with rumors of haunts, chemical spills, and serial killers.

Climb atop one of the world's longest and heaviest trains for an unbelievable journey across the Sahara Desert.

A Victorian mansion, painstakingly reproduced to appear just as the the Munster's family home did on TV.

A Texas-sized particle collider that was abandoned due to its Texas-sized budget.

The Cathedral of St. Ambrose has been hiding a special parishioner within its walls.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

London's last remaining public soapbox site has seen speeches from Karl Marx, Vladmir Lenin, and George Orwell.

A 300-year-old tea shop that brought tea to the English people, not to mention the Queen herself.

The quaint little store that is said to have inspired a famous Dickens novel was only given its name after the book was released.

The "beautiful" equation predicting the movement of all electromagnetic particles is engraved in front of Newton's tomb.

Hidden beneath the streets of London is a secret subway that only carried mail.

The giant skeleton sculpture is surprisingly well-traveled.

A formerly opulent Italian village is now a crumbling ghost town that no one really knows what to do with.

The doodles of a genius line the walls of a secret room under the Medici Chapel, where they were hidden for nearly 500 years.

The oldest operating pharmacy in the world features 800-year-old recipes.

Hidden in an Italian forest is a completely homemade amusement park that has taken a lifetime to create.

As can be expected from a centuries old church built in a canal city, the undercroft of this house of worship is beautifully flooded.

This Venice bookstore has resigned itself to constant flooding by keeping its books in bathtubs and boats.

100 year tradition of fist fights, marked by marble footsteps.

This community on a small Venetian island has taken to painting their houses in bright neon hues.

This iconic L.A. bookshop is housed in an abandoned bank—both symbolic and chic.

During prohibition, corrupt city officials ran drinking dens under the streets of Downtown Los Angeles.