Cleveland's giant "free" stamp is a nod to the Civil War, but was misinterpreted for years.

Funded by John D. Rockefeller, this is one of the earliest, and most beautiful, shopping arcades in America.

This spectacular public market has got meat, fish, vegetables, baked goods, and enough kielbasa for a lifetime.

After sunset the heart of Zanzibar's historic Stone Town neighborhood transforms into a culinary playground.

340-foot statue built to honour the Heroes of the Soviet Union.

The second largest in the world, this massive underground void has its own subway.

Ruins of a former government building destroyed during the Georgian-Abkhaz war in the wake of the fall of the Soviet Union.

The charmingly disheveled clock tower of Tbilisi's puppet theater.

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

An underground city of salt.

Poland's oldest salt mine has nearly everything one needs to live underground forever.

Dating back almost 400 years, the oldest public collection library in the United Kingdom was once the study hall of Karl Marx.

19th century museum with an eclectic mix of curiosities, from Egyptian artifacts to items on archery history to the skull of the world's oldest horse.

A Victorian Gothic masterpiece housing a world-class collection of rare books and manuscripts.

This beach runway is off limits during high tide.