Also known as the Blue Church, the building was consecrated to the daughter of Andrew II.

This Slovakian statue of an emerging sewer worker might just be a bronze peeping tom.

Launched by Napoleon's soldiers more than 200 years ago, a cannonball remains embedded in the tower wall.

Site of the 1889 murder-suicide of crown prince Rudolf and his lover Mary Vetsera.

Vienna's giant wonder wheel had a starring role in one of the greatest noir movies of all time.

Built to give thanks for the passing of a plague epidemic, this cathedral is a one-of-a-kind architectural hybrid.

The former private quarters and office of Dr. Sigmund Freud now hosts a museum housing the works of the founding father of psychoanalysis.

An 18-meter-long sarcophagus of a constantly growing dead prophet.

Baroque celebration of the end of the Great Plague of Vienna.

A neo-Gothic church built to thank God for saving the Emperor of Austria from an assassination.

Light still pours into the ruins of this ancient Islamic observatory.

The Avenue of Mausolea is a series of grand palatial tombs.

The floor of the oldest surviving synagogue in the Americas is entirely covered in sand.