The only theatre in the world constructed specifically for sound movement.

A huge musical instrument played by the ocean.

An artsy hidden staircase leads to breathtaking views of San Francisco.

The site of the one of the most deadly train wrecks in American history.

Furniture tries to escape an abandoned building in San Francisco.

Huge masonic hall in Philadelphia with lavishly themed rooms.

An ancient tunnel in Jerusalem built to redirect water in the event of a siege is one of history’s great architectural innovations.

Once an indicator of social class, the color blue has come to define this city on the edge of the Thar Desert.

This long unused shot tower on the Mississippi remains a point of pride for a small city in Iowa.

A completely underwater art museum sends a stark message about humans' impact on the environment.

One of the world's largest model railroads is a mind-boggling achievement.

A pixel art killer whale is frozen mid-leap in this Vancouver square.

The shortest in the world, this landing strip stretches a mere 1,312 feet before steep cliffs on either end plunge into the Caribbean.

Where the lovelorn find a home for their sentimental keepsakes.

Before he was America’s most famous preservationist, John Muir was an ingenious mechanical inventor.