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

A 1,215-foot tunnel transports pedestrians beneath the River Thames.

It's possible to walk inside one of the largest Neolithic tombs in Britain.

Europe's largest prehistoric mound – burial site of a legendary king?

The largest stone circle in the world has ended up bringing up more questions than it has answered.

A fantastic castle rumored to be the birthplace of King Arthur.

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

Looking strangely like Rome's Colosseum, this unfinished tower has dominated the skyline for over 100 years.

A small island abbey is the final resting place of many medieval Scottish monarchs, including the real Macbeth.

Overlooked by many, the two famous Scottish warriors guard the main gate of Edinburgh Castle.

The most iconic structure in Scotland has been home to bishops, colonels, and Sean Connery characters.

This town named for the ancient God of War is home to fewer than a thousand people, but it's the birthplace of the Greek Revolution.

A cave network located at the southernmost tip of mainland Greece was once believed to be an entrance to Hades.

This 18th-century former mosque held the first Hellenic Parliament.

A staircase made of gravestones leads up to this church built into a giant rock.

This church is dedicated to the patron saint of seafarers.

This building was once the most magnificent mansion in Nafplio.

Public water fountains built during the Ottoman Era still stand throughout this seaside town.

The historic tower houses of this nearly abandoned Greek town have been compared to the spikes on an iguana's back.

This wrecked ghost ship has been rusting on a Greek beach since the 1980s.

Europe's oldest still-operational tea farm also boasts a spectacular view.

Palatial mansion estate used in films including "Flowers in the Attic" and "The Witches of Eastwick."

One of 100 “Whaling Wall" murals painted in 13 different countries by a renowned marine life artist.

Try a classic Necco candy bar being resurrected in a small suburban shop.