I took this photo with my smartphone after 2 hours walking in the forest. It is an Aqueduct named as Maglova which is considered one of the chief works of the world water architecture. The belt, which is 36 meters high and 257 meters long, is two storeys. There are 8 small eyes on the upper floor and 8 on the lower floor of the arch. Four of the eyes on the lower floor were made larger than the others. Their width is 18.4 meters. On the upper floor, the width of the middle four is 13.4 meters.
Here is a photo for the contest of 