In The Book of Boba Fett, much of the action takes place in the city of Mos Espa, previously seen in The Phantom Menace and Attack of the Clones. The version of it seen in the show has most of the city at the bottom of a large canyon or pit:
As far as I know, this is the first time this version of Mos Espa has been seen. In the 2016 edition of Complete Locations, for example, Mos Espa is pictured as being built on a flat part of the desert. It also appears to be in the middle of the flat desert in The Phantom Menace, although the scenes we see could just take place on the outskirts above the cliff.
I'm guessing this was a creative decision made to visually distinguish Mos Espa from Mos Eisley, which parts of The Mandalorian take place in, but is there any official word about this choice? In-universe and out-of-universe explanations are both welcome.