There is a wall around my land(Garden). What is the correct word to call it?
- parapet wall
- Any other
I'd call that a brick wall (or, building on Frank's answer, a brick perimeter wall).
A perimeter wall can also be called a boundary wall.
That looks like a dividing wall.
If it goes all the way round your property it could be a perimeter wall
That definitely looks like a compound wall. http://www.houzz.com/compound-wall reinforces my definition
That looks like a "privacy wall" to me.
enclosure is a special word for what you mean. OALD defines the word as a piece of land surrounded by a fence or wall.
I would call that a boundary of walls.