Borthwick Castle - Credit: Wikimedia Commons
Borthwick Castle is one of the largest and best-preserved surviving medieval Scottish fortifications.Chambers 1828, p.99 It is located south-east of Edinburgh, to the east of the village of Borthwick, on a site protected on three sides by a steep fall in the ground. It was constructed in 1430 for Sir William Borthwick, from whom the castle takes its name,Scott 1834, p.196Chambers 1828, p.100 Read more on Wikipedia
Source: en.wikipedia.org