It is a Very historical and nice place to visit. There is a nice area surrounding it and you will get a good feeling being at this place.
It is a must see place in Tehran with amazing construction. It is the only building which remain from big earthquake.
The 20 meters tall brick tower is the tomb of Seljuk ruler Tuğrul Beg, who died in Rey in 1063. Originally, like other monuments of its time, it was capped by a conical dome, which would have added to its height. The dome collapsed during an earthquake