A replica of the steam engine that hauled Queen Victoria's Royal Train is on display at Windsor.

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

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

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

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

A building that survived WWII, possibly on the virtue of its name alone.

Huge winged monument in the United Kingdom.

A replica of the gaslit streetlamp under which three teenagers founded a football club.

This statue of one of the engineers who created the London Underground hides a ventilation shaft for the tube lines that run under the street.

The Dublin sea wall draws walkers, photographers, and fishing enthusiasts.

An encyclopedic collection of mammal penises.

This boat represents the promise of undiscovered territory, a dream of hope, and progress and freedom for Iceland.

The accidental discovery of this gilt bronze head led archaeologists to find the Roman Baths in the city of Bath

This picturesque horseshoe weir was first built in the 1600s to prevent flooding in the town of Bath.

The largest offshore wind farm in the world would be even bigger if it weren't for some pesky birds.

Surreal riveted sea forts once protected the Kent shores from German attack.

The largest greenhouse in the world is home to over one million types of plants.

A plaque marks the spot where the saint was shoved off the Charles Bridge and into the river.

A historic and beautiful Art Nouveau chamber in a historic railway station.

Dedicated to the man who saved hundreds of children from Nazi-occupied Czechoslovakia.

Macabre astrological automaton clock dating to the late 1400s.

Engineering ingenuity during the battle of Gibraltar.

The world’s second-largest flood defense barrier has protected London for decades.

An unusual artwork dedicated to a unique man that entertained people visiting Cambridge while raising money for charity.