About 1.6km (1 mile) southeast of Threave Castle, these gardens are built around Threave House, a Scottish baronial mansion constructed during the Victorian era. It's run by the National Trust for Scotland, which uses the complex as a school for gardening and as a wildfowl refuge. The garden is at its best in April, when the daffodils bloom, and in June, when the rhododendrons and the rock garden are in flower. On-site are a visitor center and a restaurant.