Every year, over 25,000 monarchs overwinter in Pacific Grove.

A pair of pure white felines guard the entrance to a spot of California real estate established as an artist's haven.

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

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

An extensive collection of ancient Egyptian artifacts and mummies.

A massive volcanic plug is now a protected area that hosts a number of bird species.

A house built from trash known as the poor man's Hearst Castle.

Home to the "Circus" trees created by Axel Erlandson.

One woman's Viking Castle on Lake Tahoe.

The lowest point in North America is home to an undrinkable pool surrounded by fields of geometric salt flats.

Odd outsider art installations surround a Gold Rush-era ghost town.

A land of debatable treasure.

This crumbling Death Valley mining complex was known for its use of giant, 20-mule team wagons.

An abandoned Jazz Age dream home and con man's hideout in Death Valley.

Standing in a state of "arrested decay," this ghost town allows for a detailed peek into Gold Rush life in an unusually harsh climate.

Aqueducts have dramatically changed this old lake, now home to tufa towers and its very own species of tiny brine shrimp.

Towering basalt columns, a creation of fire and ice.

19th-century operating theatre in which the use of ether was first demonstrated - plus, a skeleton and a mummy!

This landmark cemetery in Boston was created more than 300 years ago.

The site of Paul Revere's historic two lantern warning.

An interesting decoration on this historic site, this weathervane comes with as many legends as it does questions.

A former waterfront market is now in the center of town due to some interesting Boston engineering.

This shop specializes in oddities and Victorian-inspired wonders.