Castle Kennedy Gardens spread across a neck of land between two lochs near Stranraer, a historic designed landscape laid out by the Earls of Stair in the 18th century. There are grand avenues, a walled garden and a lot of tender planting that thrives in the mild Rhins climate, from monkey puzzles to towering rhododendrons. Seasonal opening with an admission charge; Stranraer station is under 2km away.