An overlooked marble is the only surviving in-place 18th century example of the measurement that changed how we define distance.

Now home to a drinking establishment, this building has a macabre history.

Take afternoon tea in a 17th-century almshouse.

This library dates back to the late 17th century and was one of the first public lending libraries in England.

These lamps were created to expel sewer gases after an event known as The Great Stink.

How did this lovely seaside English village come by such an unusual name?

An allegorical statue of a giant pregnant woman representing justice and truth.

A sculpture of the famous photograph stands on San Diego's "Greatest Generation Walk."

The blinking light atop the iconic landmark has been sending secret messages for decades.

A complicated contraption for telling time by the moon.

Local legend says Isaac Newton built this footbridge without any screws, bolts, or nails.

Numberless clock creates a meal of time for the dreaded, insectile Chronophage.

A treasure trove of astronomical, mathematical, and scientific instruments at Cambridge University.

The Cambridge pub where Francis Crick announced that he and James Watson had discovered the DNA double-helix.

This tree was grafted from the actual tree that led Isaac Newton to ponder the theory of gravity.

One of several Lilliputian portals that are ready to transport passengers to other dimensions, if they can find them.

It took years to decode its mysterious messages.

The Tudor-style cottage in the middle of the square is not quite what it seems.

The last remaining example of the boatmen's perches that once dotted the south bank of the Thames.

Originally built for London’s cab drivers, this bright green hut now serves anyone a hot drink or meal.

The sumptuous ceiling was one of the last things Charles I saw before his execution.

Museum dedicated to the UK's first charity for abandoned children, with keepsakes of the mothers who left them behind.

The broken skateboards that became a poignant memorial to a murdered skater.

This pump on the bad side of Victorian London betrayed a horrifying revelation about the water supply.