If you want to have a full view over this huge city from above, this is probably the best place to go. This is the best walking hill in Tehran and You will have a magnificent view over city of Tehran.
The walking road has a mild slope which makes it suitable for walking at any age. It startes from station 0 and ends in station 1. You can walk from station 0 to station 1 in about 30 minutes. You can also use the bus service for going up or coming down.