Left untouched since a double murder-suicide in the 1960s, Los Feliz murder mansion remains a neighborhood mystery.

High on a hill overlooking Los Angeles lives a world famous, high power conical Tesla Coil.

Hollywood's most famous landmark, the "temporary" sign that has stood for decades longer than intended.

The abandoned zoo enclosures offer a perfect place to experience the other side of the bars.

Under the right circumstances, this waterfall in Yosemite briefly turns a luminescent fiery orange.

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.

Eons old volcanic activity created one of the most stunning rock formations in the United States.

Once thought to be the oldest living tree in the world, Methuselah was germinated before the Egyptian pyramids were built.

An eerie smiling woman looms above the granite tombstones.

Once adorning a New York skyscraper, these reclaimed ruins now haunt an Indiana park.

The remains of this visionary community can still be found much as it was a century ago.

The world's longest known cave system.

This abandoned Civil War fortress is slowly being swallowed by the waters of Lake Borgne.

Once defending the city of New Orleans from invasion by sea, this fort faces an uncertain future.

The crumbling ruins of this southern American fort have survived storms, war, and cults.

"Try not to knock anything over!"

Statue in Salem of the woman who starred as the witch Samantha in the sitcom "Bewitched."

The 340-year-old house that inspired the classic Nathaniel Hawthorne novel.

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

Mrs. Mallard and her brood are a beloved fixture in Boston Public Garden.

This impressive Boston holy house is the American mecca for Christian scientists.

Historic Hull Street was actually the first street with a proper name in the Boston area.

This monument on Breed's Hill proves that one of the most famous battles of the Revolutionary War is misnamed.