South Riccalton Farm Cottage

Floors Castle is the seat of the Duke of Roxburghe, near Kelso in the Scottish Borders. Despite the name it is an estate house rather than a fortress, designed by William Adam in the 1720s and later given its turrets and battlements by William Playfair.

Tip: Different parts of the estate open at different times, so check the Floors Castle website for what is open and how to enter before you set off.

Chillingham Castle is a 13th-century fortress in Northumberland, listed Grade I. It stands on what was once the border between England and Scotland, and was repeatedly attacked and besieged. Edward I stayed here in 1298, and James I in 1617. Inside you can see its grand rooms, including the great hall, and walk through the gardens and grounds. There are lakes and a tearoom too.

Hermitage Castle is a semi-ruined stronghold in the remote valley of the Hermitage Water, in Scotland's wild border country. It was targeted for 400 years because of its role in controlling the Scottish Middle March, and it has a name as one of the most sinister and atmospheric castles in Scotland.

Tip: In the summer season (1 April to 31 October) it is covered by the Historic Environment Scotland Explorer Pass, but not in winter, so check before you go.

Kelso Abbey was founded in the 1100s and was one of Scotland's largest and wealthiest religious houses. The monks moved here in 1128, close to King David I's new castle at Roxburgh. Next to nothing remains of the sprawling monastery precinct, but what survives of the church is one of the most spectacular architectural achievements in medieval Scotland.

Tip: Smailholm Tower is about 6 miles away and Dryburgh Abbey about 9 miles, so both are easy to add to the day.

Smailholm Tower is a 15th-century tower house near Kelso, in the care of Historic Environment Scotland. It is a remarkably complete laird's residence that still stands roofed and floored, perched on a crag with wide views over the surrounding countryside.

Tip: Book your visit online in advance for a specific date and time, and consider pairing it with nearby Dryburgh Abbey.

Mellerstain House is a Borders country house, and one of the first buildings Robert Adam designed in his 'Castle' style. Guided tours take you through rooms with his delicate plasterwork ceilings and wall decoration. The library is the finest of them. On the top floor, the gallery displays costumes, fans, embroideries and documents.

Tip: The house is open for tours only part of the year, while the gardens stay open year-round, so check the Mellerstain website before you set off.