Castles in the United Kingdom

The initials "GW" mark where one of Scotland's most important Protestant martyrs was burned at the stake.

This modest relic, with rich history as a strategic fort through multiple eras.

The ruins of this magnificent Scottish castle blend both Gothic and Renaissance architectural styles.

In 1977, an eccentric book lover formed a micronation for book lovers.

The castle that provided the setting for much of 'Monty Python and the Holy Grail' is now a pilgrimage site for fans.

This ruined castle is said to be the legendary keep of a Viking princess.

Inside a Scottish castle hangs the tattered remains of a flag with murky origins and supposed magic powers.

This castle was first occupied in the 1400s and has undergone major restoration in recent times.

Almost nothing but earthworks remain of this long-lost castle.

Built in 1547, these ruins lie on a rocky promontory in Ballintoy jutting into the wild ocean waters below.

The ruins of a 15th-century tower house.

The ruins of a once-grand castle that played host to a tournament with 100,000 attendees.

This original castle in Kendal is 1,000 years old.

A mysterious Castle is now home to a rare breed of goat.

Once the overnight home of Mary Queen of Scots.

This garden has existed for more than three centuries.