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

Now famous as the "Harry Potter bridge," this impressive concrete viaduct has long been an icon in its own right.

Nestled amid the peaks and lochs of the Scottish Highlands, this inn and pub has played host to outlaws and ghosts.

This castle resides in a valley known for immense bloodshed during the Middle Ages.

These remarkable cascades are the jewels of Upper Tees.

This French ghost town from World War II has been left as a memorial to German atrocities during World War II.

A unique bridge with an equally unique view.

The fairy tale castle of the “fairy-tale king,” this was also the inspiration for Disney’s “Sleeping Beauty.”

A small but immensely extravagant palace built by the "Night King."

A fearsome dragon clings to a corner of Munich's city hall.

Daily jousts and dancing barrel makers in Munich's mechanical clock.

Go surfing on this urban wave, "hacked" by local surfers.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

A quaint medieval harbour where Benjamin Franklin landed in 1776.

Hundreds of prehistoric stones, arranged in perfect lines in a French field.

The largest underground church in Europe.

The world's largest reflecting pool is just two centimeters deep.

A young Gustave Eiffel assisted in the construction of this skinny metal observation tower.

Soaring over 6,000 feet in the Bavarian Alps, this beer garden was once Hitler's 50th birthday present.

Dress up like a miner and take a slide into the disco-lit depths of this once foundational salt mine.

Walk inside a half mile long crevice right outside the town of Garmisch Partenkirchen.

The ruins of this gorgeous clifftop castle look like something from a fantasy novel.

This logic-defying 16th-century Tudor manor still stands to the delight and astonishment of onlookers.

This fantastical and eclectic English garden takes its inspiration from Egypt, China, the occult and more.