Castle Stalker is a four-story tower house located near Port Appin, Argyll, by Scotland.
It is believed that this structure was built around 1320 by Clan MacDougall, who was then Lords of Lorn. It was abandoned around 1840 when it lost its roof.
In 1908, it was re-purchased and had basic conservation work done.
This castle is quite famous and has appeared in the films Monty Python and the Holy Grail and two Highlander movies.
It is one of the best examples of a medieval tower-house surviving in western Scotland.