Electrical outlets can be designed to be hidden or placed in a area to utilize a certain space. In a kitchen there are many times where an outlet placed on the side of an island or even a strip of outlets either on the island or under overhangs can be useful. Backslashes that are bar height often will have an outlet or two. This is a very common place for them. Outlets can also be hidden behind drawer fronts to camouflage and keep a distinct design.
Bathrooms sometimes have hidden outlets, sometimes in drawers, above or inside a cabinet. You typically see outlets in odd places in your kitchen than bathroom but they technically can be hidden anywhere in the home. Ask you remodeler to be creative in hiding your outlet in an inconspicuous place.