A magnificent, long-abandoned castle built in the wake of the reconquest of Spain.

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

The Liverpool street made famous by the Beatles is real.

These engineering masterpieces are a dominant feature of the Belfast skyline.

Hundreds of stone stairs and a winding medieval bridge connect this haunting Spanish island to the mainland.

The atmospheric road was never meant to be so creepy.

A king's pet, a pope's gift, an artist's inspiration, and a tragic shipwreck.

In Florence's great Duomo, a 26 foot fresco honors a mercenary famous for attacking Florence.

This strange bovine gargoyle is said to have been put in as a passive aggressive form of revenge.

This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”

The highest peak in mainland Spain is said to be the final resting place of a Muslim king.

This sweet-toothed bear searching for snacks has been a symbol of Madrid for decades.

Commonly acknowledged as the only public monument to the Devil himself.

Considered the birthplace of the Copper Age and Bronze Age, the river is tinted red from 5,000 years of mining.

This small chapel is built of human bones and decorated with a golden skeleton.

Perhaps the most spectacular grotto along the Algarve coastline.

Ancient human remains unearthed around the iconic monument.

Stormy conditions send jets of seawater bursting through holes in the cliffs.

These medieval skyscrapers dominate the skyline of this small Tuscan town.

Massive puppet-automaton machines created by French artist collective Machines de l’Ile.

The quiet field that inspired one of the most famous songs of all time.

The castle still holds traces of the abandoned Roman fort it was built atop.

This hill and tower are steeped in legend, from King Arthur to the Holy Grail.

Fascinating town where normal life interfaces with the occult.