Go take a picture with the inventor of the daguerreotype photographic process.

The unique traffic pattern named for an influential urban planner is also known as the Pedestrian Scramble.

Perhaps the most scandalous statue of America's first president.

There’s a hidden military meme engraved on the World War II Memorial.

The walls of the iconic dome are hollow and have a secret stairway.

Fittingly, America's museum of architecture is itself a magnificently designed old building.

A daily replay of the experiment that proved the rotation of the Earth.

A local prank turned town icon.

This elaborate towering structure was once famed for its revolutionary height.

This charming colonial alleyway is one of the oldest continuously used residential streets in the U.S.

World's largest Christmas store.

This shallow cave got its name from copious amount of human bones found inside.

A popular place to pick up prehistoric coral fossils from the time when Michigan was an ocean.

This national park on the shore of Lake Michigan features remarkable dunes that lie at the heart of a Chippewa legend.

Mary Kelly was last seen here before she was murdered by Jack the Ripper.

Elaborately carved to showcase the glorious wealth that the age of exploration brought to the Portuguese empire.

This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”

A king's pet, a pope's gift, an artist's inspiration, and a tragic shipwreck.

Legacy of the earthquake that nearly wiped Lisbon off the face of the Earth.

An ancient Egyptian temple in the middle of Madrid, Spain.

The oldest restaurant in the world is this old-world Spanish eatery, still known for its suckling pig.

The second oldest continuously operating bar in Louisiana.

This symbolic piece of New Orleans architecture is also home to a few ghastly stories.

An incarceration museum on the spot of possibly the oldest prison in England.