This is Britain's one and only clock concealed in the pavement.

At just 51 feet and 10 inches long, it's the shortest street in England.

All unmarked mute swans on the Thames are owned by the Queen per a tradition that began in the 12th century.

The largest and best-preserved rotunda in Prague.

Regency-era excess on the English Coast.

Look up from the busy streets to discover how time is kept!

19th-century scientists would make the pilgrimage here to verify the precision of their measuring sticks.

A quartet of tiled art pieces adorn the floors of this prestigious art museum.

The oldest working mechanical clock in the world.

This column celebrates Rome's victory over the Goths, and may be the oldest Roman monument in Istanbul.

One of Ayutthaya’s most iconic locations is a mysterious, hauntingly surreal miracle.

No one is sure if the world's fourth-largest diamond had been found in a rubbish heap or was pawned by Napoleon's mom.

A marvel of Byzantine engineering under the streets of Istanbul.

Ancient serpentine sacrifice holder that has stood the test of time.

This remarkably well-preserved Egyptian plinth is pretty well traveled for a giant piece of stone.

A fountain standing as a testament to a doomed alliance.

An Art Nouveau gem hides beneath the layers of city grime obscuring this once-magnificent building.

This historic hotel preserves many treasures from its heyday hosting passengers on the Orient Express.

A gorgeous, Gaudí-esque stairway constructed in the city of Istanbul by a prominent Jewish family.

Climb a steep hill in 90 seconds on the second-oldest urban subway in the world.

Taking the subway here means doing so over a bridge located in the middle of an estuary.

A legendary rocking stone, returned to its clifftop perch.

A open air theatre built on a cliff by an eccentric British woman.

A tribute to the intrepid explorer and his crew who perished in terrible conditions on an ill-fated expedition to the Arctic.