The overgrown ruins of a once thriving World War I-era copper mine.

The 10-foot-wide Long Beach home was built on a dare.

Originally conceived as part of a proposed Arizona State Capitol building in the 1950s, this structure built in 2004 stands as a monument to the architect's legacy.

The massive, incredibly rare instrument is over 11 feet tall with a range so deep it goes lower than humans can hear.

One of few surviving standpipe water towers in the U.S.

An abandoned meat mecca now serves as an excellent locale for urban exploration.

A late sculptor's last project was to turn this abandoned cement factory into a castle-themed amusement park.

Less a museum than a bizarre fantasy world created by artists and engineers.

A historic bridge with a lovely acoustic anomaly.

Cheap art and political theater in Vermont.

The highest point in the state of New Hampshire, and while unlikely "the worst weather in the world," it sure seems that way to hikers.

A 19th-century Gothic, castle-like statehouse by the Mississippi River.

This sculpture may be the only known depiction of a man who helped finance the American Revolution and inadvertently created the dollar sign.

The LSU mascot lived on the college campus in one of the most impressive tiger habitats in the country.

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

A little piece of Paris in the sultry south of the U.S.

A crumbling stone stable and carriage house are all that remain of a manse that was once filled with Egyptian artifacts.

A stunning garden filled with fantastical environmental folk art and sculptures.

Once the largest public hospital for the mentally ill was also surrounded by controversy.

The final resting place of the famous Rhode Island lighthouse keeper who heroically saved dozens of people from drowning.

An eccentric inventor's castle home with its own indoor weather system.

Enjoy an overnight at an old haunted B&B site of the Borden family murders.

A castle on a hill once named "the most beautiful high school in Massachusetts."

The sea urchin sculpture is an unusual commemoration of a New England town's seafaring history.