Iran hosts world's largest sundial

Toghrol Tower in the Iranian city of Rey is the world's largest sundial.

The centuries-old tower is an incredible feat of engineering, and its accuracy in calculating time is a testament to how much importance Iranians have placed on keeping track of the passage of time.

Toghrol Tower was built during the Seljuk period and still runs like clockwork.

If you know how it works, you will be amazed at its accuracy in calculating time.

The sundial is used to tell time by the shadow that is cast on each side of the tower.

It is definitely worth a visit if you are ever in Rey!

AG/AG