An eerie, decaying ghost town destined to fade into the forest.

This abandoned Victorian-style house was built in 1884.

This might just be the TARDIS of bookstores.

Enchanting gardens surround a derelict mansion, all hidden in plain sight behind a stone wall.

Once the tallest building in the world, this abandoned church is now a monument to the destruction of WWII.

Old Danish castle immortalized in Shakespeare's Hamlet.

The birthplace of an eccentric alchemist and possible inspiration for the fictional reanimator of monsters.

This ghost town in Belgium will lose its street art when it ceases to exist.

With over 100 jam-packed rooms to explore plus elaborate tea services and events, the Mansion on O Street is a hidden treasure.

The oldest farmer's market in America is so ancient it was approved by the King of England.

A magical and peaceful ruined Cistercian abbey in what is now southern Belgium.

Once the local rulers had gone these enchanting ruins housed common folk in an almost real life fairy tale.

This centuries-old gothic monster has been converted into a sprawling, glossy bookstore.

Terrifying derelict military hospital once housed a recuperating Hitler.

This medieval castle overlooking the Elzbach river looks just like it did hundreds of years ago.

One of Europe's oldest libraries.

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

Once a farm where patients tilled the soil, this asylum lost its workforce when overmedicating became common practice.

London's most popular recording studio, located in the capital's East End, runs partly on solar power and has played host to some of the world's biggest acts.

Besieged by war, this castle ruin has crumbled into a peaceful picnic spot.

This Gothic Revival castle used as a shooting location for "The Secret Garden" and other films.

The stately remains of Llywelyn the Great's mighty fortress.

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

The remains of a failed attempt at medieval nerdery are hidden deep in the woods of Virginia.