Rulers of  Amer erected strong fortification around their kingdom, which involved a series of walls and watchtowers. This fortification can be seen all around Amer Fort.  Here is a shot clicked from one such wall.

This wall is referred to as the Great Wall of Amer as it encircles the Amer Fort. Today only 10-15% of this wall is in good condition. The rest has been allowed to fall in a state of disrepair. Here is another picture of the great wall fro another post The Great Wall Of Amer & The Translucent Sky

It shows these watchtowers of Amer Fort from a different perspective.