- **Description**: The main complex, known as Callanish I, …

- **Description**: The main complex, known as Callanish I, consists of a central circle of 13 stones with a large monolith at the center (the tallest stone being about 4.8 meters tall), surrounded by five radial lines of stones creating an approximate Celtic cross or cross-like shape. The entire setup looks like an elongated cross from above due to the extension of stones to the north.