Scalloway Castle 
Description
Vacant for more than 300 years it is still in relatively good shape (the roof may have disappeared, but you can see what is supposed to have looked like when it was inhabited). You can wander around the castle grounds without a problem, but to access the castle you have to try the door. If it's locked it's a short walk back to the Scalloway hotel to pick up the key to let yourself in! Inside there is a display on the history of the castle, and its commissioner Earl Patrick Stewart (eventually beheaded in Edinburgh for his tyrannical treatment of his tenants and residents of the Orkney and Shetland Islands).
Charge
Free (key held at the Scalloway hotel if the door is locked!)
Getting There
Latitude: 60.135607; Longitude: -1.274071
What3Words: steepest.enigma.scarf
