Megachurch turned Catholic church comprised of 10,000 glass panes.

The largest drain hole in the world.

A trash dump made beautiful by nature's power.

A statue commemorate Tommie Smith and John Carlos's brave protest at the 1968 Olympics, a watershed moment for civil rights.

A giant chess set, minus the psychedelic drug trip.

The headquarters of a secretive order is also a beautifully-designed park.

An extensive collection of ancient Egyptian artifacts and mummies.

The largest permanent Monopoly board makes one of the longest games even bigger.

San Francisco Bay's ghost town.

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

Before Nixon, "watergate" meant canals.

Decades before the scandal, this staircase on the river was a literal "water gate."

Home to items never before seen by the public.

The oldest farmer's market in America is so ancient it was approved by the King of England.

Not truly a ship nor a building, the Navy's first and last "landship" is now abandoned due to clerical issues.

A sculpture of the famous photograph stands on San Diego's "Greatest Generation Walk."

North America's largest accredited model railroad museum.

An inconspicuous footbridge beloved by San Diego locals.

An extraordinarily ornate museum in San Diego holds wondrous anthropological treasures.

Only hotel where you can legally launder money.

A man-made island in scenic San Francisco Bay.

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

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

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