The cathedral's live rooster and hen symbolize a renowned medieval miracle associated with Santo Domingo de la Calzada

At 207 feet, one of the world's longest continuous escalators.

A lover's walk between hilltop towns, decorated with graffiti love notes.

At the birthplace of American railroading, a world-class collection of historic trains.

The childhood home of the Sultan of Swat is just a line drive away from Oriole Park at Camden Yards.

This bug-eyed water wheel uses the power of the Sun to clean up Baltimore Harbor.

During the 19th century, you could pay for violence off a prix fixe menu on this Manhattan street.

A rare forest habitat nestled behind two sand dunes.

Try not to get slimed in Tribeca.

A tiny museum housed in a New York freight elevator specializes in the "overlooked, dismissed, or ignored."

An easily overlooked memorial to a Ukrainian famine-genocide that killed over 4 million people.

A historic arena where the Beatles played their first concert in the U.S.

One day a year it is legal to jump off of this astoundingly tall bridge that spans an Appalachian gorge.

A former limestone quarry has found a new life as a flourishing community garden.

Forget Hollywood, one of the biggest stars in the world can be found in Roanoke, Virginia.

This museum celebrates a legendary railroad photographer whose personal life was as dramatic as his photos.

Washington's top-secret Cold War-era doomsday communications tower is located in a small neighborhood park.

The only Civil War battle in Washington D.C. took place near this highest natural point in the city.

This peculiar Italian elevator runs both horizontally and vertically.

Perched above a grotto, this tribute to Mother Nature looks out into the ocean.

The city of Parma's cathedral is home to one of the greatest illusionistic frescoes of the Renaissance.

This grisly effigy displays an early Christian martyr who was skinned alive and beheaded.

An exclusive waiting room built for the royal family in the 1920s is hidden in Milan’s central station.

Two very green residential towers cleaning the air in one of Europe's most polluted cities.