Guns that have been defending San Francisco since 1904.

Only hotel where you can legally launder money.

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

At Washington's Dulles Airport is a satellite museum (no pun intended) with three quarters of a million square feet of aircraft history.

A desert ghost town—occupied for only 12 years—was once home to more than 500 silver mines.

This simple convenience store sits on the location where the Ouija board was named—and has a plaque to prove it.

A monumental statue of RCA's mascot now sits atop a historical society roof after a life of moving around.

Giant Redwood-themed cafeteria operates under the golden rule, "Dine Free Unless Delighted."

Stepping away from the glitz of mobsters and casinos to learn about the other history of Vegas.

Four hundred granite steps were built into this massive rock by the National Park Service.

What looks like a suicide in progress is actually a statue of Sigmund Freud.

This free, take-a-book shop seems like a trick but isn't.

The bunker where Hitler took his own life is hidden under this deliberately ordinary parking lot.

The last holdout of a pre-Civil War rebel who took the matter of slavery into his own hands.

One of the world's tallest Ferris wheels takes visitors high above Las Vegas in a spinning party room.

Dyed by iron oxide over centuries, these sandstone rocks rise thousands of feet into the sky.

This iconic L.A. bookshop is housed in an abandoned bank—both symbolic and chic.

The beautiful 1920 Pantages Theatre remains hidden just underneath the LA Downtown Jewelry Exchange.

A small square plaque marks a failed assassination attempt that could have changed history.

Germany's Glienicke Bridge has a shady history of clandestine meetings, espionage, and spycraft.

Small museum packed with artifacts recovered by the man rumored to be the real-life inspiration for Indiana Jones.

Medical and zoological curiosities for sale.

A look into the Church of Scientology's deeply unfavorable view of psychiatry.

The so-called "Bridge of Thighs" in Palm Springs allows nudists to discreetly cross the road.