In this historic region, homes and churches are carved into ancient volcanic rock formations.

In Florence's great Duomo, a 26 foot fresco honors a mercenary famous for attacking Florence.

An enormous park-like oasis, full of famous Chicagoans’ graves.

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

Not to be confused with the iconic New York City skyscraper, this Chicago building is a vibrant hub for artists.

A Bibliophile's Dream.

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

Once called the "Polish Gold Coast" it is an icon of the neighborhood that bears its same name.

Beloved bar home to musicians of all eras and reputations.

Combination beer garden and music venue in the heart of Wicker Park.

The faint remains of a Polish news empire still linger.

Home to a protest movement, a bombing, and a dramatic change in labor history.

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

A gothic church spire sits atop this skyscraper, the tallest church in the world.

The prototype for all Nazi concentration camps.

The footprint of a frustrated devil in Munich's Cathedral.

An Austrian house of bones filled with hundreds of intricately painted skulls.

The celebrated eyesore created by starry-eyed sweethearts.

Hundreds of prehistoric stones, arranged in perfect lines in a French field.

America's oldest archaeological site or a muddled case of wishful thinking.

Cold war icon and onetime "hole" in the iron curtain.

Amazing and mysterious Neolithic settlement on Scotland's Orkney Islands.

This 17th-century street hidden beneath Edinburgh was once a breeding ground for the black death.

The most loyal of little dogs, or a Victorian era publicity stunt?