This block in downtown Brooklyn was a hotbed of antislavery activism along the Underground Railroad.

Parking lot where a Chicago mayor was inaugurated under very sketchy circumstances.

Fragments of architectural wonders from around the globe are embedded in the newspaper building's walls.

The iconic Chicago sculpture hides a beautiful and easily overlooked plaque on the backside.

The king of U.S. high points towers over every other peak on the continent.

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.

Once a popular watering hole among longshoremen and shipyard workers, this neighborhood treasure spans more than 100 years of Red Hook history.

Take in a rare, face-to-face glimpse of Lady Liberty at this tucked away Red Hook park.

This wall on a street corner in Lower Manhattan has been a blank canvas for a rotation of renowned artists since the 1980s.

The greatest real estate coup of all time.

An acoustic anomaly with a mysterious cause sits in the heart of Tulsa.

A once crucial portion of the Long Island railroad still lays abandoned, waiting to be turned into an urban park.

This Queens beer hall preserves a German culture and language that is all but lost.

The bells remain in a shattered heap exactly as they fell when the church was bombed in World War II.

Elvis's own personal tropical hideaway.

A statue honors the local legend that the devil helped build St. Mary's church after being tricked into thinking it was going to be a wine bar.

A plaque marks a former safe house on the secret route, now hidden next to a McDonald's.

This memorial plaque remembers a strangely shallow maritime disaster known as "Chicago's Titanic."

Golden and naked, the figure that was once the highest point in New York is all that remains of the second Madison Square Garden.

Yo, Adrian!

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

The taxidermied remains of Charles Dickens' pet raven, which helped inspire one of Edgar Allan Poe's most famous poems.

This elaborate towering structure was once famed for its revolutionary height.

One of the longest water bridges in the world was built over a supposedly haunted swamp in Louisiana.