A long lost multi-cultural music venue used to reside in the bottom floor of Chicago's Flat Iron Building.

These mansions date back to Chicago's days as a brewer's paradise.

Built to house a chapter of the Knights Templar, this grandiose building is a relic of Freemasonry in Chicago a century ago.

In a quiet north Chicago neighborhood rests a stunning relic of the golden age of earthenware design.

The palatial McDonald's that inspired Wesley Willis.

This memorial plaque remembers a strangely shallow maritime disaster known as "Chicago's Titanic."

A spectacular remnant of an Adler and Sullivan masterpiece that was destroyed in 1972.

An outdoor urban gallery of large-scale artworks by the world's most influential street artists.

The last masonry skyscraper ever built reveals a transitional moment in architectural history.

In the middle of a Vienna square, Roman ruins dating back some 2,000 years are on display.

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

A silly medieval mural preserved on the side of a Viennese house.

The solemn exterior conceals an opulent interior of this 17th century church.

A spherical "micro-nation" in the heart of Vienna.

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

Terrifically morbid cemetary and site of famous Paracelsus' grave.

Ugly 18th-century dwarf statues living in a perfectly landscaped Austrian garden.

One of the most easily accessible examples of the rare 1960s UFO houses.

Golden cobblestones remember a time when this small alley was used to avoid having to give a Nazi salute.

Daily jousts and dancing barrel makers in Munich's mechanical clock.

A stairway to heaven, or to nowhere at all.

A giant snail sculpture looking longingly at the German traffic museum.

This massive statue is the personification of Bavaria and the first colossal statue of the modern period composed of bronze.

This century-old cinema house has a marquee that has been hand painted by a single man for over 25 years.