This alley in downtown Chicago held the bodies of over 600 people after the fateful Iroquois Theatre fire.

The stones that traveled from Spain to eventually become a holy place for San Francisco's nature worshippers.

The oldest giants in Catalonia are now displayed in a 14th-century Gothic church.

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

This Philly cemetery is the eternal home of many famous area residents, including Rocky Balboa's wife.

Sections of the iconic limestone columns have been left uncleaned as a reminder of the city's polluted past.

The largest clock face in the United States is twice the size of Big Ben and infinitely more ad-sponsored.

A model of a dinosaur that was named for Andrew Carnegie stands outside the museum that also bears his name.

Built in 1870 at the bridge that connected Buda and Pest, this spectacular incline railway was almost lost forever during World War II.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

The blood-soaked ruins of the castle where the murderous Blood Countess was walled in alive.

A 200-year-old bar in the historic French Quarter refuses to give up its place in history, nor its role in securing ours.

The world’s first penitentiary, meant to be humane, drove men insane.

An abandoned cemetery lies in ruins as the surrounding forest swallows it whole.

A 56-foot tall statue of the god of fire looks out over Birmingham, Alabama.

This university transit system is a 1970's vision of the future.

The last holdout of a pre-Civil War rebel who took the matter of slavery into his own hands.

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

Memorializing an American tragedy of massive proportions.

Yo, Adrian!

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

Steepest flood safety railway in the entire world.

The house that Frank Lloyd Wright "(shook) out of his sleeve at will" at the age of 86.

Frank Lloyd Wright’s most iconic home dangles over a Pennsylvania waterfall.