The Tower of Toghrol is monument of the period of Seljuks, built by king Toghrol and dates back to the 13th Century AD. The towers height is about 20 meters; its internal and external diameters are 11 and 16 meters, respectively.
The Tower of Toghrol is indeed a solar clock; its external surface is divided into 24 facets (representing 24 hours) and on upper part of each facet there are 4 semi-circles each representing a quarter of an hour. A little more upward there are 6 rectangles each representing 10 minutes and there are also very small grooves on them showing the seconds. Any new position of sun will change the shadows of these forms, revealing the exact time.
It is said that this tower is also the grave of Toghrol himself, because of his interest in astronomy.