After it was swallowed by a Georgian mansion, this medieval castle remained forgotten for centuries.

Fantastic stainless steel dragon gates complete with mesh wings.

A devastating booze inferno poured through the streets, claiming several victims who drank it.

This is the largest cemetery in Ireland and the first cemetery museum in the world.

A nun spent 16 years painting the stunning Celtic mural that covers the interior of this WWI memorial.

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

A floating museum that was sunk by a flood and left to rot in the tides.

The remains of Martha, the last known passenger pigeon, serve as a tool to educate about conservation.

This restaurant has been a haven for D.C.'s LGBTQ community since the 1950s.

This lovely pocket park is one of the most under appreciated in D.C.

The first purpose-built art gallery in the United States is once again open as a center of craft arts.

The granite monument is engraved with the image of the talking horse's head coming through a barn door.

Along the historic Mother Road is an old gas station with a secret counterfeiting past.

The future of roadside attractions is this sci-fi soda mecca that is home to a 66-foot tall neon pop bottle.

An allegedly haunted mansion with a tragic, tawdry past.

The first park built over a freeway is a brutalist masterwork.

Extraordinary sculpture garden created by an eccentric English poet.

London's creepiest cemetery was once the site of dueling magicians and mobs of stake-carrying vampire hunters.

Ship-sized kinetic sculptural fantasy.

London's largest outsider art museum.

This wildly-tiled artist's palace is a living and growing account of the creator's life, loves, and labors.

The final resting place and once home of the Bandit Queen of the West.

This former small town was destroyed not by the motor oil it sprayed the ground with but by the toxic waste that was added.

This is not your typical jungle gym.