A Pythagorean funhouse that tries, successfully, to prove that math is the coolest thing ever.

A good place to research the Freemasons, esoterica, occultism, and hermeticism.

A posh members-only club with a literally dramatic history.

Possible relics of the ancient Roman city are hidden in this restaurant's façade.

A terrific purveyor of natural history objects and curios.

A hidden "place of interment for gentlemen."

A room in New York City that contains 250 cubic yards of dirt worth a million dollars.

The oldest surviving synagogue in New York City is now a soaring art space.

Unrepaired walls from a 1920 anarchist bomb attack.

This cemetery has graves dating back to the 17th century, including the city's oldest carved tombstone and an ominous cryptogram.

Built hundreds of years ago this downtown iron barrier once protected a much despised king.

A historic 1890s architectural masterpiece with an iconic clock tower that, once open to the public, now faces an uncertain future.

Equal parts record-breaking temple to consumerism and bizarre fun park, it's more than you think it is...

A butcher shop in Minneapolis has all the meats and cheeses you’d expect from any of its kind—except that all the products are vegan.

The second oldest continuously operating bar in Louisiana.

A 200-year-old bar in the historic French Quarter refuses to give up its place in history, nor its role in securing ours.

A century-old hotspot for jazz, frequented by everyone from Charlie Chaplin to Al Capone.

Built to house a chapter of the Knights Templar, this grandiose building is a relic of Freemasonry in Chicago a century ago.

Each of these gorgeous, intricately decorated rooms is painstakingly crafted to the scale of 1 inch: 1 foot.

While many places make the claim, the Library of Congress says this restaurant is the birthplace of the hamburger.

Housed in a memorial lighthouse, this museum relays the history of surfing, beginning with the antics of royal Hawaiian teenagers.

This municipal playground was co-created by the father of one of the most playful characters ever.

Featuring a casually threatening atmosphere along with dessert and coffee to die for.

A focal point of the Cuban government, this city square features one of the most iconic images in the country.