This site generates income via partnerships with carefully selected travel brands and/ or purchases made through links to them. As an Amazon Associate I earn from qualifying purchases. See why this is important.A Black Cab Tour of Belfast is an eye-opening experience. In some areas of Belfast the Peace Walls are getting higher, while in other areas there is a possibility of the walls being removed. Gate keepers on either side of the wall are responsible for opening their gates in the morning and locking them in the evening.