A collection of 20th-century automata, penny arcade games, and musical contraptions.

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

Its buzzing collection honors vibrator history.

An artsy hidden staircase leads to breathtaking views of San Francisco.

This shrine to bovine consumption and all things fast food is a slice of culinary history both rare and well done.

A double agent hid information for the Soviet Union beneath this bridge for more than 20 years.

This 29-ton granite ball spins around at the slightest touch thanks to a scientific phenomenon.

The oldest living tree in Manhattan comes shrouded in sinister legend.

Visit the monolithic tomb of America's most famous general.

Behind a bodega is a small museum of relics and ephemera showcasing the history of New York.

The abandoned personal amusement park of the King of Pop.

The one-stop shop for all of your superhero (or evil arch-nemesis) needs.

The oldest family-run luncheonette in New York, last renovated in 1948, still serves food and drinks the old-fashioned way.

A tiny museum housed in a New York freight elevator specializes in the "overlooked, dismissed, or ignored."