Where condemned pirates met their grisly end at the gallows on the River Thames.

Surreal riveted sea forts once protected the Kent shores from German attack.

The anatomical-pathological collection of a man who changed surgery.

Amazing and mysterious Neolithic settlement on Scotland's Orkney Islands.

High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.

Ruined 11th century abbey built by King David I in Edinburgh, Scotland.

The longest hedge maze in the world.

Banksy gives themself artistic license with this piece of London street art.

The very center of Paris is surrounded by a bevy of strange good luck rituals.

This fantastical waterfall is hidden in a cave located in a cracked cliff.

A 30-acre garden inspired by the principles of modern physics.

A museum of carnival attractions where you are invited to ride the rides.

Northern Ireland's Brobdingnagian stepping stones.

Paranormal experiences in this hotel's room 217 led Stephen King to write "The Shining."

The first declared National Monument in the United States.

17th century streets hidden under Edinburgh were once a breeding ground for the black death.

James Turrell's total color immersion art installation, hidden on the top floor of a luxury handbag shop.

The atmospheric road was never meant to be so creepy.

These remote Florida islands have a history of sea turtles and sunken treasures, and one of the world's largest coastal brick fortresses.

Famously misunderstood wonder of the ancient world

This dramatic landscape hidden on the Isle of Skye looks as though you've stepped into the magical realm.

Wondrous sandstone hoodoos where Native Americans collected clay for pottery, 9,000 years ago.

A trash dump made beautiful by nature's power.

Abandoned railway line circling the city of Paris.