A crumbling hospital from the 1850s on Roosevelt Island.

The mysterious, fantastical woodland inspiration for "The Lord of the Rings."

Tucked in the back of this amazing antique store is an important piece of medical history.

This beautiful building in the heart of Manhattan's Financial District was empty for decades.

Remants of foundations, streets, and streetcar tracks inhabit the cliffs where a landslide occurred in 1929.

An abandoned cemetery lies in ruins as the surrounding forest swallows it whole.

A 16th-century horror show built in a lovely Italian garden.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

Abandoned railway line circling the city of Paris.

An old vending machine serves up unpredictable beverages from its seemingly magical insides.

The United States Capitol's former columns still stand.

The hidden "ballroom" under a mansion lake was built by a criminal who ate a cyanide pill during his trial.

Paris' linguistic guide to the international language of, yes, love.

Rising from the sea like a stone monster.

The most iconic structure in Scotland has been home to bishops, colonels, and Sean Connery characters.

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

This abandoned asylum was once a state of the art facility before devolving into one of the most deadly mental institutions in American history.

Where beautiful signs live on forever.

The seawater playground of gilded-era San Francisco burned to the ground in 1966.

A collection of haunted artifacts chronicles the career of the world's most famous paranormal investigators.

The crypt of the imposing Stephensdom holds royal intestines and thousands of skeletons.

The hidden lair of an alchemist rediscovered in a 2002 flood.

A self-built castle made by a mysterious man.