A highway marker that honors a former spy plane pilot and local hero.

The Pentagon sits on a former island that was in Virginia at low tide and D.C. at high tide.

A double agent hid information for the Soviet Union beneath this bridge for more than 20 years.

The Virginia farm where John Wilkes Booth met his grisly end is now largely forgotten.

This historic mansion was built as a symbol of love between a husband and wife.

America's first public mental health facility.

This Virginia railway overpass is said to be haunted by a serial killer in a rabbit costume.

The final resting place of one of Thomas Jefferson's formerly enslaved sons.

A bronze plaque marks the site of the only show the "King of the Soul Singers" ever missed.

One of the last surviving C-97s sits in a field in front of a Wisconsin inn.

A restaurant and lodge in northern Wisconsin which served as a clandestine hideout for John Dillinger and featured one of the most famous botched FBI raids in history.

Software company Epic Systems has created one of the strangest and largest workplaces of all time.

A stone marker memorializes the spot where the King broke up a street fight with a classic karate stance.

A forgotten Cold War relic hidden in the outskirts of a Wisconsin city.

Gambling, boozing, and yodeling animals cover the walls of this dive bar cum natural history museum.

Eternal resting place of the grave robber and murderer who served as inspiration for many of cinema’s famous madmen.

A metal ring in the middle of the road marks the exact spot where the Soviet satellite crash-landed in 1962.

Hidden away in the city of Madison, Wisconsin is a nearly forgotten home that Frank Lloyd Wright built for a childhood friend.

Macabre museum devoted to historical Viennese murders.

This former insane asylum now holds a pathological anatomy museum.

The ruins of an Estonian prison are drowning in the quarry lake where the convicts were once forced to work.

This soviet pilot's graveyard is filled with headstones made of airplane fins.

A grotesque Fiji merman dwells within this traditional Dutch-style building.

A wrecked ship dating back to the American Revolution was only recently discovered off the Delaware coast.