A dreamy mausoleum honors Persia's most famous poet.

An unusual sand beach in the middle of a forest.

Why a column on the entrance is inscribed with a verse from the Quran is one of Sicily's many mysteries.

The remains of the left arm of the levitating philosopher-saint are kept in a 13th-century Neapolitan basilica.

Legend has it this fountain built to symbolize the Pope’s power hides a strange secret concerning Neptune's manliness.

Luxury hotel turned into a refugee camp, then turned back into a luxury hotel.

An abandoned facility that has become a place of ritualistic satanic worship, or so rumor has it.

Two stunning 17th-century libraries and a cabinet of curiosities.

The crypt of the imposing Stephensdom holds royal intestines and thousands of skeletons.

Elaborately carved to showcase the glorious wealth that the age of exploration brought to the Portuguese empire.

Legacy of the earthquake that nearly wiped Lisbon off the face of the Earth.

360° views of the city plus five floors of optical illusions and hands-on science.

The final resting place of the great navigator, or maybe his brother.

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

This unreal Portuguese palace looks as though it's made from a pile of different castles.

Built in 1870 at the bridge that connected Buda and Pest, this spectacular incline railway was almost lost forever during World War II.

A Parisian cemetery where the elite and artistic are interred beneath an eccentric collection of tombs.

A horde of stray cats rule in this secluded Parisian cemetery under a bridge.

A sharp bend in a dramatic river canyon cut through red rocks.

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

A spiritual vortex among the red rocks in Sedona.

A six-ton wedding present for the King of the Scots.

Breathtaking and huge 430 year old maps of Italy.

Climb inside an iron crystal magnified 165 billion times its normal size.