Scots will recognise their historical landscape in the battlements of Edinburgh Castle or in the iconic bridge of Eilean Donan, the most photographed castle in the world.

The most popular castles in Scotland are Edinburgh, Stirling and Urquhart, which collectively pull in almost 2.5 million visitors per year.

But perhaps bizarrely, it's one of the unsung castles in Scotland which has recently been featured as the capital's best fortress by the New York Times.

So, in celebration of our lesser-known fortresses, allow us to take you on a brief tour of the smallest, most remote and most unusual castles in Scotland.

Annual visitors: 2000 - 3000

Known for: Motte-and-bailey style

There are few motte-and-bailey castles surviving in Britain as they were made from earth and timber in the 12th century.

Duffus was originally built by a Flemish soldier and has interesting family history. It's earthy mound and man-made ditch means it was difficult to attack.

Annual visitors: 25,139

Known for: Luscious gardens and dovecote

Dirleton is best known as the residence of three noble families, all of whom made their own version of the castle within the walls.

Each made various modifications which are still visible in three different styles. Its gardens are thought to originate in the 16th or 17th century.

Annual visitors: 300 - 800

Known for: It is the earliest documented medieval stone castle in Scotland

Built in 1145 by Norse chieftan Kolbein Hruga, Cubbie Row's (or Roo's) was beseiged in 1231 by a Norse king - and was described as a "very unhandy place to attack".

It's impressive strength means it has preserved well - the only castle coming close is the Castle of Old Wick.

Annual visitors: 10,594

Known for: Dramatic scenery and as a massive Borders fortress

Hermitage is almost right on the border between Scotland and Endland, and for nearly all of existence was a key strategic place to control north-south routes. As a result it was fought over frequently.

It is one of the most remote castles in Scotland and was visited by Mary Queen of Scots.

In slightly less believable history, rumour has it a giant's grave lies nearby.

Annual visitors: 17,500 - 19,500

Known for: It is the only lighthouse castle in Scotland.

Kinnaird Head is the only structure where the castle tower was adapted into a lighthouse. The alternative may have been demolition in order to construct a lighthouse, making it a great survivor.

The lighthouse itself went out of service in early 90s.

Annual visitors: 1500 - 2500

Known for: It is the most northerly castle in Britain.

This castle operated in an extremely turbulent period of Shetland's history.

It's owner had many disagreements with owners of other castles and they took each other to court frequently.

Annual visitors: 12,500 - 14,500

Known for: Unusual round shape

This is an example of a castle... that isn't really a castle. The tower house is surrounded by idyllic landscapes and is rare because of its circular shape.

Visitors can make their way up its spiral stairs and walk on the battlements.

Annual visitors: 10,594

Known for: Royal dynasty

Rothesay is unique among Scottish castles for it's close links with the Stewarts. To this day, the heir to the throne still has the title Duke of Rothesay.

It was visited by royals James IV and James V who carried out major works in the later 1400s, including adding the gatehouse and St Michael's Chapel in the courtyard.