Claypotts Castle
Dundee City, Scotland
Interior open free on four dates yearly; exterior year-round
Craigievar Castle
Aberdeenshire, Scotland
Pink tower house; interior visits by guided tour
Crathes Castle
Aberdeenshire, Scotland
16th-century tower house with painted ceilings and gardens
Drum Castle
Aberdeenshire, Scotland
Medieval tower plus mansion; holiday cottage in courtyard, not castle
Elcho Castle
Perth and Kinross, Scotland
Remarkably complete roofed 1560s tower house; seasonal
Huntingtower Castle
Perth and Kinross, Scotland
Twin towers with rare painted ceilings
Smailholm Tower
Scottish Borders, Scotland
Roofed Border peel tower; seasonal opening
Threave Castle
Dumfries and Galloway, Scotland
Island tower of Archibald the Grim; boat access; also listed under National Trust for Scotland