The last of Philadelphia's wood-paved streets is now a landmark of terrible engineering.

Yo, Adrian!

The first American department store, and home to the largest operating musical instrument in the world.

This charming colonial alleyway is one of the oldest continuously used residential streets in the U.S.

An old whaling station now serves to give the public a look at the commercial whaling industry, no longer a part of Monterey's economy.

A chain of bells connect the California Missions and honor the legend of the "King’s Highway."

One of the most elaborate displays of Jellyfish is on display at the aquarium.

Concrete strongholds stand guard over the Golden Gate.

Oakland's beautiful monumental cemetery.

The lighthouse central to the 1980s horror classic "The Fog" is, in fact, located in one of the foggiest areas of the Pacific Coast.

A creepy steel gremlin has protected the Bay Bridge since 1989.

A pair of large white marble lions guard this stretch of the Mojave Desert, and it is utterly mysterious how they got there.

A sign at the end of the Santa Monica Pier marks the traditional end of the legendary American highway.

Life in this isolated, hilltop lighthouse was lonely, but it sure was lovely.

The unbelievably opulent home built for an infamous newspaperman.

One of the ghostly stops along Route 66.

A 300-ship graveyard, with a few still visible at low tide.

Quite simply the largest tree in the world (by volume).

One of the most scenic stretches of road in America winds between some of the country's oldest trees.

These delicate buggers are some of the rarest fossils that have bubbled up from the Tar Pits.

This charming candle shop has been in business since 1789.

Elaborately carved to showcase the glorious wealth that the age of exploration brought to the Portuguese empire.

A king's pet, a pope's gift, an artist's inspiration, and a tragic shipwreck.

A Byzantine church containing the holy remnants of three saints sits atop the site of an ancient temple.