This striking observation tower shaped like a spinnaker sail is the newest icon in historic Portsmouth.

The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

Arthur, Merlin, and Guinevere are among the largest and oldest satellite dishes on the planet.

This massive chalk hill carving is one of England's most beloved giant horse geoglyphs.

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

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

A half-mile-long stretch of medieval forts built after a devastating pirate attack persists amid the modern port city.

Before 1993, this historic-looking village—King Charles III's pet project—didn’t exist at all.

It is said the legendary wizard once lived in this sea cave beneath Tintagel Castle.

A whimsical cottage from the 1300s with a preserved Victorian-era post office inside.

Ireland's most remarkable collection of these curious cone-shaped houses is worth the buzz.

This large torch on the Hove coastline helped Sir Francis Drake defend England from the Spanish fleet.

The world's first purpose-built motor racetrack was destroyed by the outbreak of two world wars.

This tiny business claims to be "the smallest pub on the planet."

An effigy of a trapped paratrooper dangles from a Normandy church to commemorate one remarkable D-Day event.

The Isle of Wight’s “Island Line” serviced by former London Underground trains from the 1930s.

A medieval replica of King Arthur's legendary table, the Round Table hanging in Winchester Castle was decorated by Henry VIII.

These 20-foot jaw bones honor a time when the leviathan bones were a sign that whalers survived the hunt.

Where the sleeping monsters of Scotland's oil industry are left to rust.

Once the largest unsupported dome in the world, beating out the Pantheon and St Peters in Rome.

A popular day's outing in Bovington consists of watching military tank driving practice.

The designer of this railway tunnel added a birthday present for himself.

This tiny 1930s Art Deco airport is a beautiful remnant of a bygone era.

The geoglyph once sported a glass bottle eye.