A Roman spa buried deep beneath the City of London.

The coffin-shaped church was once home to monks who slept in coffins.

The oldest still-operating tavern in the United States was once owned by a pirate.

A 250-year-old timepiece-automaton adorned with golden mechanical birds, which still sing to this day.

One of the world's most complex timepieces.

The earliest known map to show America, discovered by accident at a Paris bookshop.

An eccentric 18th century naval officer built a ship's quarterdeck on his roof, the inspiration for Mary Poppins's "Admiral Boom."

Dedicated to the art and science of glass in equal measure, this space is as much laboratory as museum.

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

A short nature trail winds through the greatest works of poet Robert Frost.

Ruins of a once-prized railroad station in New York.

Literally a million fascinating cartographic artifacts are held in this sprawling university collection.

The largest known medieval map of the world.

The great Italian Renaissance painter was laid to rest here in the Chapel of Saint-Hubert.

Rome's ancient Etruscan rival, now a park full of ruins.

With well over 130 falls and cascades to brag about, Hamilton, Ontario has earned its stripes as the waterfall capital of the world.

Former abode of notable poet, complete with literary references and stories of ghosts.

The only intersection in America where the buildings on all four corners were built pre-Revolutionary War.

A volcanic old faithful, Stromboli has been erupting continuously for the last 2000 years.

Stunning Roman aqueduct used for 1900 years and still standing.

The possible imprisonment of Vlad the Impaler here earned the medieval castle its nickname, "Dracula's Castle."

An ancient instrument used to measure the waters of the Nile so Egyptian farmers would know whether to expect famine or flood.

A series of waterfalls so massive they straddle the border of Argentina and Brazil.

Ozymandias’ time-keeping temple.