stone structure, possibly part of a castle or old building, featuring an arched entrance

stone structure, possibly part of a castle or old building, featuring an arched entrance. The stone walls are constructed of various sizes and shapes of gray and brown stones. The entrance leads into a dark, unseen interior. At the top of the structure, there are protruding stone elements, possibly machicolations or decorative features. The camera slowly pans upwards, revealing more of the stone wall and its details. The environment seems overcast or cloudy, based on the lighting. Bird sounds can be heard in the background.