Prone to disastrous fires, the city of San Francisco has the Guardian, a fireboat gifted by residents, to watch over them from the bay.

At night, this glittering musical tunnel draws skaters and photographers.

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

The only standing town in the United States that early Chinese Americans built for themselves.

A fake block of cheese remembers a feat of dairy engineering from the Chicago World's Fair.

Yale University's home for rare works, including the mysterious Voynich Manuscript.

Louise Bourgeois' 30-foot-tall steel spider sculpture.

This is the oldest Roman-made bridge in the city still existing in its original state.

This ancient market is often referred to as the oldest shopping mall in the world.

Brass cobblestones mark the places where individual Holocaust victims were taken from their homes.

Installed in an act of one-upsmanship, the annual sundial in this church is also a symbolic victory for the Gregorian calendar.

The martyr's wax-enhanced skeletal remains lie preserved in a glass case in the Santa Maria della Vittoria in Rome.

The skull of the patron saint of lovers lies in the Basilica di Santa Maria in Cosmedin—maybe.

2300-year-old Roman road connecting the empire.

The yawning maw of this pagan visage is said to bite off the hands of liars.

An ancient Egyptian obelisk is now used to commemorate fallen Italian soldiers.

This Roman arch marks the location of an ancient gate at one of the Seven Hills of Rome.

This old-world mansion with lush gardens is a gem in the heart of Silicon Valley.

The hallucinogenic center of the ancient world.

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.

Fake rail crossings mark the site of an influential doctor's demise.

Steinbeck's old stomping grounds, immortalized in Cannery Row.

The oldest continuously operating church in California.

The oldest U.S. Government building in California, and it's State Historic Landmark #1.