Nikola Tesla's former home contains an homage hidden from plain sight.

The world's oldest hologram gallery and the labyrinthine laser laboratory of a holography pioneer.

This medieval chapel is now a shrine to the region's favorite sport.

This rare aquatic phenomenon is one of the more accessible tidal bores in Morecambe Bay.

This star-shaped artillery fort protected the mouth of the Thames from the 16th century to the Second World War.

1920's reinforced concrete church by architect Auguste Perret changes the face of modern design.

A mythically themed self-built sculpture park.

The oldest working mechanical clock in the world.

This London plaque marks the spot where David Bowie's famous alien made his debut.

A historic London pub with prison cells in the cellar and a "spy room" on the second floor.

This shop and gallery is a modern-day cabinet of curiosities, unassumingly positioned along an urban thoroughfare.

One of Europe's largest supercomputers is housed inside of a disused chapel.

A beautiful but toxic fountain of mercury.

This work of engineering is imbued with elegance and ingeniousness.

This long line of cement defensive wedges is named after the famous chocolate bar for obvious reasons.

This secret Swiss fortress is disguised as a harmless pink house, complete with fake windows.

This is not only one of the oldest collections in Europe, but also possibly the most beautiful.

The largest bottled beer collection in the world holds over 22,000 unique beer bottles.

Part of this hotel resides in Switzerland, the other in France, and the border splits the honeymoon suite.

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

A 30-acre garden inspired by the principles of modern physics.

At the United Kingdom's only residential library you can sleep among the books.

A succinct inscription commemorates the ebb and flow of a woman's life.

Fantastically decorated underground chambers built in the 1760s.