Southern Italy's spinning top village.

Macabre symbols of death and mummies on display set the tone of this Italian purgatory church.

A dead saint, a deadly poison, and a mysterious holy ooze.

A cave in southern Italy adorned with thousand-year-old Biblical frescoes existed in obscurity until fairly recently.

An impressive bridge over a ravine also served as an aqueduct.

Three underground crypts and a pointed arch under the bell tower make this cathedral unique among Romanesque churches.

2300-year-old Roman road connecting the empire.

Roman politician Herodes Atticus built this nymphaeum to honor his wife, whom he may have murdered.

Tiki luxury on Nob Hill.

A treasure trove of Renaissance-era funerary art in a Roman church built on top of Nero's grave.

Romans decided this 16th-century "talking statue" was so ugly, they named it after a primate.

Brass cobblestones mark the places where individual Holocaust victims were taken from their homes.

Climb the dead electric pylons of Messina.

People have been living in the cave houses on this Italian hillside since the Neolithic era.

Skulls and skeletons are omnipresent in this church dedicated to souls trapped in purgatory.

Legend says if you stick your thumb in the hole and it gets wet, your wish will be granted.

This half-forgotten fortress was constructed by the Ottoman conqueror of Constantinople.

A gorgeous, Gaudí-esque stairway constructed in the city of Istanbul by a prominent Jewish family.

This remarkably well-preserved Egyptian plinth is pretty well traveled for a giant piece of stone.

This column celebrates Rome's victory over the Goths, and may be the oldest Roman monument in Istanbul.

Five sultans and their families rest in eternal splendor, teeming with overlooked beauty and drama.

A marvel of Byzantine engineering under the streets of Istanbul.

142 ceramic steps become a mosaic once a year.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.