Castle Stalker is a small, picturesque castle located on a tidal island in Scotland, near the Argyll region. Built in the 15th century, it was originally constructed as a stronghold for the Stewart family. The castle features a distinctive four-story tower and is surrounded by stunning views of the surrounding landscape and waters. The castle is accessible only during low tide, adding to its charm and historical significance. Today, Castle Stalker is a popular tourist attraction, known for its scenic beauty and as a filming location for the movie "Monty Python and the Holy Grail." Visitors can admire its architecture and the natural beauty of the area.