The saltiest lake in all of Crimea is also the pinkest of the pink and teeming with life.

According to the local folklore, the myriad colors of this lake are the result of a lovelorn wizard's blunder.

Venice's "Island of the Mad."

The underground sanctuary of a mysterious ancient cult.

The glowing blue Nymphaeum of Emperor Tiberius.

You can cross from one country to another in a single hop on this little bridge.

A circus of light and sound forms a sensory ode to an iconic train that will never pass through town again.

A charming Spanish village sits atop this natural limestone overpass.

A master of trompe-l'oeil creates a stunning, tourist-fooling dome out of a flat ceiling.

The final resting place of the poets Shelley and Keats.

Rome's semi-secret peephole vista is also a former Crusader stronghold.

A fairy tale castle in modern Rome.

Installed in an act of one-upsmanship, the annual sundial in this church is also a symbolic victory for the Gregorian calendar.

A Spanish artist builds his own castle.

Architectureal fantasy quarter of Rome.

Walk upon the mementos of the dead in this Parisian courtyard paved with medieval tombstones.

The Fox Sisters, America's leading mediums in the mid-19th century, possessed a table they claimed helped them "communicate" with the dead.

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

The 14th-century ruins are said to contain healing powers.

This oddly placed 15th-century church is one of only six bridge chapels left in England.

A city block packed with whimsical sculptures that seem to be plucked from a tiled fantasy world.

100 year tradition of fist fights, marked by marble footsteps.

A new sculpture calls attention to climate change in the centuries-old city it threatens.

An unrealized Taoist palace left abandoned in a Houston suburb.