The macabre collection of Jacques Sirgent, an expert scholar on the undead and all of their trappings.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

A once grand hotel now sits eerily abandoned in the Catalan countryside outside Barcelona.

This cemetery features modernist statues as strange as its name.

These secluded and abandoned anti-aircraft defenses have become one the most scenic viewpoints in Barcelona.

This hidden rooftop garden in downtown London offers a quiet respite from a bustling city.

Since 1874, this macabre collection has developed into a museum devoted to Scotland Yard's mementos of dastardly deeds.

This bewitching Babylonian goddess haunts a hallway of the British Museum.

The final resting place of a German diplomat's beloved companion.

The bones of two medieval royal lions were discovered at the historic fortress.

This East End pub gained notoriety as the site where gangster Ronnie Kray publicly shot a rival.

Where's a guy to go after a long, hard day at work?

This historic building displays the remains of a victim of the devastating 14th-century plague.

Drink your espresso at a Victorian-era urinal in this underground-restroom-turned-coffee-bar.

A statue of the original Pearly King is hidden in a church's crypt.

The plunge pool is a surviving relic of a rowdy royal residence.

This unique bridge curls up like a caterpillar to let boats pass and then unfurls again to span a small canal.

The fences outside some of South London's estates are made from recycled World War II stretchers.

One of the few remaining examples of 19th-century London’s attempt to clean up its reputation.

A bronze bust commemorates the heroism of the secret agents who led covert operations against the Nazis.

A boutique perfumery fashioned to look like a Victorian-era shop.

An unusual ode to the late Irish playwright, complete with a squiggly bust and coffin-shaped bench.

Buried for centuries, this hidden cellar is all that remains of London's medieval Whitefriars Monastery.

A sculpture outside London's oldest cathedral honors the Mohegan chief who died while petitioning the king.