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

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

A traditional American farmhouse plopped in the middle of a Piccadilly courtyard.

An architectural oddity hides in plain sight on this iconic London bridge.

A quiet, semi-secret square with statues of Mahatma Gandhi, Virginia Woolf, and a conscientious objectors stone.

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

These official units of measurement—including chains and perches—lie hidden beneath tourists' feet in a popular London hub.

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.

Giant, friendly pelicans in Central London, the most unlikely of places.

The curios of pharmacist and collector Henry Wellcome.

A 300-year-old tea shop that brought tea to the English people, not to mention the Queen herself.

This vessel is believed to be the oldest operating fireboat in the world.

The seat of Buffalo government is a gorgeous Art Deco palace.

A 19th-century architectural wonder designed by the "father of the skyscraper."

This unique crypt designed by Frank Lloyd Wright for his longtime friend was not completed in either man's lifetime.

The absurd creation is a compulsory destination for selfies in Buffalo.

The site of William McKinley's tragic assassination is only marked by an underwhelming boulder.