This small 16th-century church in Athens is almost entirely surrounded by a modern building.

An ancient octagonal weather station named for the eight Greek gods of wind.

Behind medieval walls in a corner of bustling Palermo is a breathtaking former mosque once inhabited by a wolf-taming hermit.

A Byzantine church containing the holy remnants of three saints sits atop the site of an ancient temple.

The only surviving choragic monument is a trophy awarded in 334 BC for the winning dramatic chorus.

This blue behemoth of a bear is a colorful homage to Brown University's mascot.

This triumphal 16th-century arched gateway leads to the oldest street in Palermo.

Memorials at a Florence railway station remember the citizens who were deported from Italy and sent to extermination camps.

This amazingly preserved Doric temple was abandoned before it was ever completed.

The ruined doorway is a portal to the building's turbulent and torturous past.

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

A sharp sculpture made of thousands of pieces of jagged glass.

Home to a vast and influential collection of Shakespeareana.

To truly appreciate Detroit's landmark skyscraper, you have to step inside.

An antique narrow gauge railway line still running through the Colorado and New Mexico mountains.

This sprawling bookstore spans four floors and has more than a million books in stock.

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

The abandoned summer estate of the former Greek Royal Family.

A small etching on the white marble parapet was written in runic script by a Viking mercenary.

The ruins of an abandoned medieval city where the last Byzantine emperor was crowned.

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

The ruins of this monumental city founded by the first Roman Emperor are strangely overlooked by most travelers.

The oldest cemetery of modern-day Athens blends the modern and ancient worlds.

A mysterious ancient elephant said to possess magic powers is now the symbol of a Sicilian city.