Started nearly 100 years ago, this science experiment just keeps on going, ever so slowly.

A famous burial ground with a history both grim and literary.

Mary Kelly was last seen here before she was murdered by Jack the Ripper.

Rebuilt remains of a temple to Roman god Mithras.

This legendary stone is of unknown origin, and throughout history has been a literal touchstone for British leaders.

The site of London's first coffee house has been serving refreshments of one kind or another for 360 years.

The last four extravagant street signs of London's historic banking street.

Catacombs turned marketplace.

Black cat statues guard this temple-like Egyptian revival factory.

This churchyard arbor is surrounded by hundreds of gravestones placed there by author Thomas Hardy.

An unassuming London park is actually a pilgrimage site for modern clowns.

A subterranean ice warehouse that has lain hidden beneath central London for over a century is now open to the public.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the Harry Potter films.

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

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

The bust of Romania’s most notorious ruler, Vlad Dracula aka "Vlad the Impaler," keeps watch over the ruins of his medieval court.

This communist behemoth is the heaviest building in the world and a legacy of a brutal regime.

An interactive exhibition space dedicated to the kinetic sculptures of Swiss artist Jean Tinguely.

The bizarre visions of H.R. Giger, tucked away in a Swiss medieval city.

A historic observatory precariously perched at the "Top of Europe."

Caves famous for the dragon-slaying saint who lived there.

A once-thriving hotel in the Swiss Alps couldn't compete with climate change.

The Swiss artist's bulbous and overgrown shape-shifting sculpture controversially graces the center of Bern.