Threave Castle is a mid-4th century keep situated on an island in the River Dee, two and a half miles west of Castle Douglas, in Dumfries and Galloway, Scotland. It served as a fortress for the Black Douglas until their fall in 1455.
It is now an ideal place to explore, picnic, and perhaps paint. The island is rich in wildflowers in summer; you may also see ospreys and otters hunting in the River.
You can take the quick boat trip across the River Dee to the island's fortress or admire the colossal tower house, which is the same height as a modern 10-story building.