Pentland Hills

Bavelaw Castle is a historic house in the City of Edinburgh council area, Scotland. It is north of Hare Hill in the Pentland Hills, four miles west of Penicuik, and two miles south of Balerno, above Threipmuir Reservoir. The house was built around a 16th-century L-plan tower house. Mary, Queen of Scots, and James VI both stayed at Bavelaw.

Threipmuir Reservoir is a reservoir in the City of Edinburgh Council area, Scotland, UK. It is situated to the south of Edinburgh in the Pentland Hills, two miles south of Balerno.Threipmuir reservoir is located behind an earth dam, constructed to a design by Scottish civil engineer James Jardine. The dam was constructed between 1843 and 1848 to augment water supplies to Edinburgh, by the Edinburgh Water Company.