Not merely a museum – but a whirring powerhouse that offers a subterranean peek into the heart and soul of cable car operations.

Its buzzing collection honors vibrator history.

The oldest burial ground in the city, final resting place of city founders, Ohlone natives and murderers alike.

A nondescript building that's been functioning as a speakeasy for nearly a century and a half.

The seawater playground of gilded-era San Francisco burned to the ground in 1966.

Once called the "Polish Gold Coast" it is an icon of the neighborhood that bears its same name.

One part antique store, one part curiosities hodge-podge.

This failed condo development was reborn as a street art hub.

Home to the largest urban bat colony in North America, estimated at 1.5 million bats.

Friction between grains of sand cause a curious "singing" sound.

"the sweltering inhabitants of Charleston and New Orleans, of Madras and Bombay and Calcutta, drink at my well . . . The pure Walden water is mingled with the sacred water of the Ganges."

This bridge was the birthplace of a unit of measurement based on a fraternity joke.

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

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

The childhood home of the meat inspector who would become the face of America.

The once-abandoned 140-year-old hotel used in the movie "In Dreams."

Once the future of underwater combat, this old sub is now open for visitors to muck around in.

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.

Final resting place of the two women killed on a small island off the coast of New Hampshire.

This subterranean disco dance club in a Cuban cave comes with bright lights and a dark legend.

One of the few remaining American elm trees in New York’s Tompkins Square Park was the birthplace of a new religion.