From the sky, a kaleidoscope of color brightens the grey landscape of the San Francisco Bay.

A historic bridge no one is allowed to cross.

The iconic Chicago sculpture hides a beautiful and easily overlooked plaque on the backside.

Illegal drag racing two stories beneath Chicago’s streets.

The place where Samuel "Slater the Traitor" brought the Industrial Revolution to America.

The 80-foot tire that looms over Michigan's I-94 was once a Ferris wheel in the New York World Fair.

This building is more than 250 years old and was built in one of the first towns settled in Massachusetts.

This clock tower is all that remains of Bird Hall, constructed by one of the founding families of this Massachusetts town.

In the middle of a New England forest sit the crumbling ruins of World War II-era ammunition storage bunkers.

America's first public lending library began with a gift from Benjamin Franklin.

One of the oldest baseball fields in continuous use has been hosting games since 1878.

Mary Rowlandson's kidnapping ordeal became one of the nation's first best-selling books.

All that remains of the Whittall mansion are the ruins of the formal garden and its pergola, dedicated to the late Matthew J. Whittall by his widow.

The gravestone of the man who designed the plastic pink flamingo is adorned with his most famous creation.

This tower pays homage to a legendary Viking fort established in Massachusetts that never really existed.

This evocatively named natural crevasse was created by a torrent of water that smashed right through a granite deposit.

A historic bridge with a lovely acoustic anomaly.

The oldest surviving wood-frame building in North America is still in the family.

Once the largest gravity dam in the world.

The romance of early commercial flight still fills this Art Deco destination.

Inside the Wayne County airport is an amazing collection of lights and sounds.

The Denver airport is guarded by a 32-foot-tall sculpture of a demonic horse.

A serene plaza that commemorates one of the Granite State's most iconic figures.

The end of the 4 Line is also the end of the line for 300,000 souls in one of NYC's most illustrious cemeteries.