Thurso Castle

[4] The Thurso Lairdship was later held by Sir John Sinclair, 1st Baronet,[6] who erected a new structure, designed as a castle or fortress.

[9] Former United States President, Ulysses S. Grant visited the castle as part of his 1877 world tour.

[10] The heir apparent to The Earldom of Sutherland, Alexander, Lord Strathnaver, died in a fall at cliffs near Thurso Castle on 3 September 2022.

[7] Robert Sinclair refers to the present castle as "a gallant ruined reminder of its former Gothic glory".

[5] About a mile to the northeast is Harald's Tower, built in 1780, which served as a burial place for the Sinclairs of Thurso.