Half-sized replica of the Leaning Tower of Pisa built to honor Galileo.

The unluckiest U-boat in the entire German fleet is now on display in a Chicago museum.

The palatial McDonald's that inspired Wesley Willis.

This historic hotel invented the chocolate brownie.

The famous author's birthplace is preserved in a town that he once described as narrow-minded.

Beloved bar home to musicians of all eras and reputations.

A beloved Chicago music venue offering cold beer and lots of “Friendly."

A bizarre house filled with an astounding array of collections.

This cave holds a surprisingly colorful variety of geological oddities.

Renaissance hospital featuring a rotating door into which unwanted babies were dropped.

This famous city eluded concrete detection until the early 2000's.

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.

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

The ancient latrines of the Greeks, in all their public glory.

Roman ruins top white travertine terraces formed by ancient hot springs.

Gladiators battle and chariots race daily in the ruins of a once-great Roman city.

Ozymandias’ time-keeping temple.

An ancient capital city that dates back 3,000 years and harbors many surprises.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

London's last remaining public soapbox site has seen speeches from Karl Marx, Vladmir Lenin, and George Orwell.

This Dresden church was purposely rebuilt Protestant after being demolished in World War II.

A chain of 16 wondrous lakes formed as a result of the gradual dissolution of soluble layers of bedrock.

This one-time health resort was used by aristocrats around the world.