Just off the north side of Amir Chakhmaq Sq is the Saheb A Zaman Club Zurkhaneh, which is worth seeing both for its Iranian brand of body building and because it’s a quite an amazing structure. The modern club is inside a cavernous ab anbar (water reservoir) built about 1580. Looking like a 29m-high standing egg from the inside, and crowned with five burly badgirs , the reservoir stored water for much of the town. The hour-long workouts in the Zurkhaneh are an interesting window on Iranian culture. Note: only males are admitted.