In the depths of Glasgow Cathedral's crypt, one pillar stands out from all others.

Climb this overlooked gem's spiral staircase and you'll be rewarded with spectacular views of Glasgow.

The ornate structure is part of a building boasting more marble than the Vatican.

The roof of this ancient mausoleum is made from a single Istrian stone weighing a massive 230 tons.

This obscure walkway links Edinburgh’s Old Town with one of the city's prime vantage points.

The pretty iron lamp is a reminder of the architecture underneath London's streets.

Where an 11th-century flying monk crash landed after attempting to take to the skies.

Mysterious heaps of stones dot these otherworldly woods.

This charming colonial alleyway is one of the oldest continuously used residential streets in the U.S.

An enormous, inside-out glass globe built in 1935.

This quaint Italian town keeps losing ground as the sides of its plateau slowly erode.

Pilgrimage site for star-crossed lovers.

It’s said this crypt was the setting for the tragic finale of the Shakespeare play.

For centuries, this large Roman villa remained hidden thanks to the eruption that buried nearby Pompeii and Herculaneum.

The highest peak in Wales is said to be the final resting place of a giant killed by King Arthur.

This fairy-tale castle would make Dracula (who is said to have been imprisoned there) jealous.

Ask nicely, and stewards of a centuries-old charitable tradition will give you free bread and beer.

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

A historic holy well hidden near a charming English park.

The oldest stone house in Paris was built by its most famous alchemist.

A submerged archeological park still holds the wonders of a Roman Sodom.

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

This 170-year-old Swiss guesthouse built into the side of a mountain is best accessed by a cable car.

One of the oldest used bookstores in the U.S. has been selling antiquarian treasures since 1825.