The now-abandoned tunnels were built for the transcontinental railroad on the route where the first wagon train entered California.

One woman's Viking Castle on Lake Tahoe.

This historic "City of the Dead" lies prominently in the center of New Orleans' famous Garden District.

The curiosities and wonders of pharmacy in a delightful historic building.

A snapshot of the city's fascinating voodoo culture.

The oldest house in the capital of Silicon Valley.

This 252 step staircase offers stunning views of San Jose.

This restaurant's marvelous musical machines include a self-playing violin.

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

For roadside fast food, pull over at the giant orange.

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

A life-sized mammoth sculpture marks the spot where the remains of a Columbian mammoth were discovered in 2005.

The rest of him lived another 61 years and was buried elsewhere.

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

An extensive collection of ancient Egyptian artifacts and mummies.

San Francisco Bay's ghost town.

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

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