The "lost friend” is the most famous of the six moai statues that were removed from Easter Island.

Never actually a tree at all, this spot was the site of London's public hangings for nearly 600 years.

This intricately carved and hilariously huge bed was such a famous symbol both Shakespeare and Byron used it in their writing.

The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

Six ravens are kept captive (but well-fed) at the Tower of London to prevent the fall of the Crown.

London's last remaining public soapbox site has seen speeches from Karl Marx, Vladmir Lenin, and George Orwell.

The medieval home is still engraved with the symbol of the profession, an eye flanked by two axes.

This Stone Age solar temple aligns with the sun on each equinox and solstice.

The ruins of a megalithic monument sit right in the garden of a luxurious Maltese resort.

This subterranean necropolis holds three floors of antler-dug grave caves.

Overshadowed by other, more famous Maltese catacombs, this ancient burial chamber has one of the best examples of a ritual agape table.

Ancient mysterious ruts carved in the bedrock.

This spectacular dome managed to survive after being bombed in World War II, in an event known as the "Miracle of Mosta."

This prison on the Maltese island of Gozo is almost 500 years old, and they have the graffiti to prove it.

The walls of Germany's Parliament still show the scars of the Red Army takeover in World War II.

The secret room where early Bolsheviks cranked out propaganda fliers on a smuggled printing press.

A museum glorifying the life of Stalin, located in the city of his birth.

The first botanical garden, a feather in the cap of the Grand Duke of Tuscany.

Nine centuries-old fortresses guard the walls of this medieval Romanian city.

A palatial former bank building now houses what may be the poshest art venue (and former Tesco) in Belfast.

The ship built to ferry passengers and goods to the doomed Titanic is now the last remaining White Star Line vessel.

Giant statue of a disembodied head.

A thousand year old oak tree survives in Liverpool.

These semi-natural waterfalls hint at the park's Victorian-era industrial past.