The miraculous hydrant that saved the Mission District in 1906.

San Francisco's oldest surviving monument and meeting place for 1906 survivors.

This partially buried wreck is one of the most complete of its kind but is only revealed when the sea allows.

This giant head is all that remains of a once proud statue that survived an earthquake but not a fall off of a wagon.

Chevron maintains one “Standard” brand station per state so it doesn’t lose the trademark.

Bring your own cardboard to the slippery slopes of concrete hidden in a neighborhood park.

Early prototype for Frank Lloyd Wright's Guggenheim.

The second building of its name to occupy this location might be the finest flatiron building in San Francisco.

Commonly referred to as the most photographed Victorian home in the United States.

Not the result of an accident, hurricane, or aliens, this is an eye-popping tribute to the Melbourne tram.

The largest shot tower in Australia is a unique reminder of industrial ammunitions history.

A whimsical menagerie of creatures carved into a 300-year-old tree trunk.

The 18th-century home was disassembled into 253 cases and brought all the way from the other side of the world.

An homage to everyone's favorite prehistoric cartoon family.

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

This Arizona observatory is famous for investigations into Martian life, and as the place humans first spotted Pluto.

Ancient pueblos built into the base of a natural canyon wall.

This historic national park is covered in the stunning ruins of red rock pueblos.

An overlooked monument to the celebrity gangster who helped put the sin in Sin City.

A new kind of theme park for adults off the Las Vegas Strip.

An exotic wildlife habitat right off The Strip.

One of the world's tallest Ferris wheels takes visitors high above Las Vegas in a spinning party room.

The first high-tech company in the valley that actually worked with silicon devices.

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