Oné of the locations that is mentioned though is the port city of Umbar which is where the Corsairs sail from to attack Minas Tirith. With such scant material to work from, artists are mostly left up to their own imaginations when it comes to this part of Middle-Earth.
DireImpulse came up with this street scene from a market in the city of Umbar. It’s hard to say if this is what Tolkien himself had in mind, but I like the imagery and the chosen palette gives you a sense of the heat of this part of the world.
Unless you look at the full size originally you won’t fully appreciate the amount of detailing that has gone into this scene. The buildings for example were modeled in 3D, and layers of textures have been applied. It really is a gorgeous bit of work.