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

A lush green oasis in the middle of Chicago.

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

This massive stained-glass masterpiece is thought to be the largest Tiffany dome in existence.

One of the largest private collections of cars manufactured by the short-lived Franklin Automobile Company.

A natural history wunderkammer in the middle of the desert.

The fading, forgotten remains of a once bright and booming factory.

The world's largest military aircraft cemetery.

This contorting sculpture is the tallest in San Francisco.

The original place where water met land in the City by the Bay is outlined in brass.

San Francisco’s condensed garden of incredible plant growth.

A garden oasis filled with flowers mentioned in the works of William Shakespeare.

This print shop boasts one of the largest pinball arcades in San Francisco.

Join the circus for a few lessons to learn clowning, acrobatics, and Chinese contortion.

This partially buried wreck is one of the most complete of its kind but is only revealed when the sea allows.

A promotional sun clock on the site of San Francisco's great raceway.

The restored and active Victorian-era final resting place of San Francisco.

This turn of the century masterpiece has a mysterious goaty interloper.

Golden Gate Park's historic collection of plants.

A modern mechanical planetary system, part of a 10,000 year clock.

A favorite haunt of dinosaur loving children and hallucinogen loving hippies alike.

A museum befitting the city responsible for supplying the majority of the world's LSD.

A tiny theater hidden in an alley plays a constant stream of short silent films for anyone willing to peer through the peephole.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.