Hide from the tourist hordes in these relatively unknown, and unguarded lava caves.

A beach made of semi-precious green sand on the Big Island of Hawaiʻi.

This black shoreline is made up of exploded lava particles.

Earth's tallest volcano is sacred to Native Hawaiians, and home to a dozen world-class observatories.

Daily jousts and dancing barrel makers in Munich's mechanical clock.

This two-room factory has been cranking out the musical signifier of zaniness for a century.

This Art Deco fortress in upstate New York gives Manhattan's vaunted examples of the style a run for their money.

A sewing machine tycoon built this miniature castle for the people and to beautify a lakeshore.

One of many reminders of Tesla's scientific contributions overlooks the falls which inspired him.

Toxic waste disaster that founded the Superfund program.

A collection of unique outdoor sculptures surounded by the beauty of nature.

Town full of spiritualists, some of whom are mediums, is still in full swing after 130 years.

100 massive sculptures in the Hudson River Valley.

A natural gas leak provides a flickering flame beneath a waterfall.

Elevated freight railway turned wildly successful urban park.

While it now takes more than a dime to open an account this historic Brooklyn bank still displays the opulence of the gilded age in which it was built.

An oasis of calm amid the chaos of the boardwalk, the museum traces the heritage of this beloved beachside amusement park.

A Victorian cemetery in the heart of Brooklyn remains a popular mecca of morbid curiosity.

This outdoor gallery of graffiti-covered walls pays homage to the past, present, and possible future of street art.

Feral cats keeping the rodent population at bay all across Greenpoint waterfront.

One of the most enjoyable bits of history at Coney Island and “the most romantic ride in the world.”

A band of aerialists and circus performers putting on incredible shows in East Williamsburg.

One of New York's best collections of pinball is hidden in a secret bar in the back of this laundromat.

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