This historic abandoned train station looks like a stop for ghost trains.

Now home to a drinking establishment, this building has a macabre history.

The ornate structure is part of a building boasting more marble than the Vatican.

Long-secret natural history museum, featuring the skull of a "Terror Bird."

The Liverpool street made famous by the Beatles is real.

This mysterious underground cave in Shropshire dates back to the 18th or 19th century.

Sometimes an island, sometimes a rocky outcropping connected to the world by a tiny suspension bridge.

A circle stone within a stone circle.

Under a church hides a forgotten 13th-century ossuary containing the remains of around 2,500 people.

A mysterious bridge over a sunken Roman road.

A spooky juxtaposition of caves and graves gives this legend-filled cemetery a particularly haunting vibe.

A petite castle folly in the English countryside.

This antique prison is a tourist attraction with a sordid past.

An 18th century monument regularly tagged with unsettling graffiti referencing a 1940s unsolved murder.

The oldest residential street in Europe also features an optical illusion.

There's a labyrinth of medieval chambers hidden deep below a 15th-century pub.

Near Birmingham, England three and a half miles of top-secret tunnels housed a World War II “shadow factory” and a Cold War nuclear bunker.

One of the few standing Roman lighthouses and a labyrinth of tunnels are a couple of the secrets at this historic castle.

This century-old grotesque has a mysterious history and may not actually be a rabbit.

This Viking gravestone carved in a rare runic style was dug up from a London churchyard.

This unchanged Victorian park is rumored to have been the inspiration behind Peter Pan's Neverland.

This giant wooden treehouse within a sprawling garden has its own eatery.

This former abandoned hospital, a complex of stunning 19th century buildings, once housed 2,000 psychiatric patients.

The oldest candy store in the world has been selling traditional sweets since 1827.