In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

The only structure left with direct ties to the Salem witchcraft trials of 1692.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

A crumbling hospital from the 1850s on Roosevelt Island.

The world’s first penitentiary, meant to be humane, drove men insane.

A stretch of highway even lonelier than the so-called "Loneliest Road in America."

This Las Vegas casino boasts one of only three spiral escalators in the United States—an engineering wonder.

The self-proclaimed gateway to the Extraterrestrial Highway.

This sign designates the road that leads to the infamous Area 51.

Mysterious meeting place for UFO hunters near Area 51.

Officially named the "Loneliest Road in America," this barren stretch of Nevada road offers almost nothing but sky and open fields.

An eatery for UFO seekers on the Extraterrestrial Highway.

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

Brightly colored 30-foot-tall totems light up the desert sky just outside Las Vegas.

In the middle of an extremely unforgiving and desolate high desert is the most secret military facility in the world.

This church houses the “incorrupt” body of its founding Bishop.

Elvis's own personal tropical hideaway.

This Memphis recording studio launched the careers of Jerry Lee Lewis, Johnny Cash, and Elvis Presley.

The hotel where Martin Luther King Jr. was shot is now a museum dedicated to his work.

The tower was originally used as a chimney for the waste incinerator of St Johns Precinct and Market.

A remarkable feat of Victorian engineering across the Firth of Forth.

An enormous steel waterfall is a nod to the substance that shaped Britain's Steel City.

Cathedral-like Victorian vaults are hidden within this iconic bridge.

A typographic tribute to the many comedic greats who make Great Britain laugh.