It took years to decode its mysterious messages.

Three plaques mark the spot where the "forgotten father of broadcasting" worked.

It is locally loved and ridiculed for literally looking like poop.

One of the largest Marian shrines on the West Coast stands rather unexpectedly in Silicon Valley.

The headquarters of the semiconductor giant has a 10,000-square-foot museum.

This one-block alleyway is stuffed with street art that is colorful, cultural, and intensely political.

The seawater playground of gilded-era San Francisco burned to the ground in 1966.

Relics of the 1894 Midwinter Exposition continue to delight visitors today.

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

An interesting decoration on this historic site, this weathervane comes with as many legends as it does questions.

A former waterfront market is now in the center of town due to some interesting Boston engineering.

Berthed at the Charlestown Navy Yard in Boston, "Old Ironsides" is the oldest commissioned warship still afloat.

The American Revolution was galvanized into serious action due to the tragic clash with British soldiers that occurred at this location.

The Boston square dedicated to the dark poet who was born nearby.

A wall of chewing gum moonlights as collective art.

A museum dedicated to the history and exploration of both popular music and science fiction.

The twin towers in this Chicago fountain use 50 foot tall video screens to spit on people.

A monument to the art of slicing people open.

Forgotten and then destroyed by fire, this was once one of the largest saltwater swimming pools in the world.

Tiki luxury on Nob Hill.

This concrete tangle of square pipes has stood as a proud thorn in the city's side since the '70s.

A nondescript building that's been functioning as a speakeasy for nearly a century and a half.

After serving in World War II and picking up Apollo astronauts, this aircraft carrier has been turned into a museum overlooking the San Francisco Bay.

Playable, historic pinball machines fill this Alameda museum.