Blackness Castle.

Taken from the House of the Binns.
Rumour has it that there is a tunnel from the House to the castle but it is quite a distance so I suspect that the tunnel is a bit of a fiction. Nice story though and worthy of a novel set in the 18th century or thereabouts.
The castle, known as the “Ship that never sailed” on account of its shape, has featured in several films and tv series, e.g. Outlander.