A clock designed to run with perfect accuracy for 10,000 years.

Scattered throughout London are ancient remnants of the city's former bounding wall.

Charles Babbage's proto-computer, painstakingly brought to life.

Ship-sized kinetic sculptural fantasy.

Shiny Brutalist box commemorates a pioneer of electricity and houses a railway transformer.

Children's hospital in London that operates on royalties received from Peter Pan, which J.M. Barrie signed over in 1929.

The former private quarters and office of Dr. Sigmund Freud now hosts a museum housing the works of the founding father of psychoanalysis.

One of the world's largest collections of pathological specimens.

This one has sailed five times as far as Sir Francis Drake's famous ship.

The curios of pharmacist and collector Henry Wellcome.

In this cobwebbed old operating theater, you can practically hear the screams of the unanesthetized patients.

A centuries-old church stands as a testament to Boston's "father of architecture."

The site of Paul Revere's historic two lantern warning.

Stolen goods adorn the organ at Old North Church.

This landmark cemetery in Boston was created more than 300 years ago.

The first bell ever cast in Boston was cast by Paul Revere...and sounded terrible.

Macabre headstones carved with winged skulls, dancing skeletons, and pithy reminders of impending death.

The American Revolution was galvanized into serious action due to the tragic clash with British soldiers that occurred at this location.

An interesting decoration on this historic site, this weathervane comes with as many legends as it does questions.

A former waterfront market is now in the center of town due to some interesting Boston engineering.

What was once a true peninsula has now been filled in, causing the water to recede and leaving many streetside "waterfronts" and landlocked "islands."

The longest hedge maze in the world.

The Bristol Camera Obscura housed in an ancient windmill.

A theatre built to house the rowdy Oxford graduation ceremonies became the stage for a debate about God's existence.