Sitting in the basement of a castle, the largest wine barrel in the world is bigger than most apartments.

It's good luck to be mocked by this monkey.

This Nazi-built amphitheater was constructed on a sacred mountain site used by various German cults.

Fantastic views and thousands of love locks.

A 'living museum' in Leiden, the oldest of its kind in the Netherlands.

The attic of a four-century-old canal house hides a clandestine church.

Established in 1638 to battle the Black Death, this botanical garden is a treasure trove of rare flora.

A floating cat sanctuary on an Amsterdam canal.

Cat art as far as the eye can see.

Six ravens are kept captive (but well-fed) at the Tower of London to prevent the fall of the Crown.

This massive collection of British military artifacts includes the heartbreaking personal letters of the men in the trenches of WWI.

Eighty million natural history specimens call this gargantuan museum home.

The perfectly preserved underground rooms where Churchill plotted the war against Germany.

This picturesque horseshoe weir was first built in the 1600s to prevent flooding in the town of Bath.

Displaced highlanders would take shelter from the wet Scottish climate under the large walled bridge at Glasgow Central Station.

On this stunning Scottish island, you can walk in the footsteps of dinosaurs.

This stately monument has been wearing a traffic cone hat for decades much to the delight of the locals.

A sweet symbol marks the place where torturous executions were once carried out.

Islanders once used this dramatic, otherworldly landscape to hide their cattle from Viking raiders.

Largest lake in Great Britain measured by surface area.

A small island abbey is the final resting place of many medieval Scottish monarchs, including the real Macbeth.

An ancient Scottish rock formation said to be the gravesite of a giant remains ensconced in legend and intrigue.

Breathtaking and huge 430 year old maps of Italy.

The most accurate timepiece in the world.