An ancient and majestic fortress that played an integral role in Portugal's road to independence.

A king's pet, a pope's gift, an artist's inspiration, and a tragic shipwreck.

This unreal Portuguese palace looks as though it's made from a pile of different castles.

A roadway designed for a visiting monarch.

A poetic monument to the Scottish Parliament.

One of Edinburgh's most popular works of street art is located well off the beaten path.

The last remaining bottle-shaped kilns in Scotland stand alone in an Edinburgh suburb.

An artist's whimsical transformation of everyday objects.

A series of three shiny letters mark the boundary of an old refuge for those being pursued by debt collectors.

Touching this 18th-century Scottish philosopher’s toe allegedly conjures good fortune.

A verdant 17th-century-style garden hidden along Edinburgh’s Royal Mile.

This obscure walkway links Edinburgh’s Old Town with one of the city's prime vantage points.

This otherwise ordinary close on the Royal Mile constituted the end of the world for Edinburgh’s poorest residents.

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

A statue in the heart of Edinburgh honors a bear that served in the Polish military during World War II.

Largest lake in Great Britain measured by surface area.

A church that bred legends, and served as an inspiration for the Da Vinci Code.

Now famous as the "Harry Potter bridge," this impressive concrete viaduct has long been an icon in its own right.

This castle was established by the 4th Duke of Montrose and is connected to the Buchanan Clan.

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

Catacombs turned marketplace.

Eighty million natural history specimens call this gargantuan museum home.

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

A open air theatre built on a cliff by an eccentric British woman.