One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

This open-pit mine is now an abandoned symbol of Bisbee's copper-mining heritage.

A living snapshot of a different time in America is preserved and maintained by a community of volunteers.

An old saloon in the West filled with history, and according to some, a few dozen ghosts.

From working out of his garage to the James Beard semifinals, one Tucson baker has kept his fan base—and his grains—local.

In Tucson a giant metal snake helps pedestrians cross a busy highway.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

An Irish church where an 800-year-old mummy is reaching out of his coffin as if to shake hands.

A quartet of tiled art pieces adorn the floors of this prestigious art museum.

Once designed as the entrance to Buckingham Palace, this structure was later relocated and stands as a victory arch.

A legend says that if this elaborately decorated glass breaks, the good fortune of its owner's household will also disappear.

A memorial for public executions that dates back to the 14th century.

At almost 1,000 years old, this is the oldest known door in all of Britain.

Chelsea's soldiers were given strict orders when crossing this historic bridge.

One of America's founding fathers lived in this London lodging between 1757 and 1775.

An eccentric Victorian aristocrat's enormous collection of medieval armor and weapons from around the world.

The Great Fire of London and the regulation of one-way streets both started in this alley.

At the top of the hour, figures of the London department store's two co-founders emerge and bow to each other.

A sculpture of a famous ape who was once a beloved household name in London.

The famous polar explorer stands outside the Royal Geographical Society's headquarters.

This intriguing Bronze Age artifact spent centuries hidden within a Welsh faerie hill.

The "beautiful" equation predicting the movement of all electromagnetic particles is engraved in front of Newton's tomb.

A mysterious shape catches the eye in this 16th-century painting.

It's a mystery why these remains were found with no traces of their bodies in sight.