What would it look like?

So my parents are totally re-doing my room and they want to do an arch in the wall behind were my bed is going, and its going to be like a dent in the wall and they're gonna put shelves inside so i can put some things there lke alarm clock, books im reading and stuff like that and they kinda have an image in their head but i have no idea what it will look like, im totally up for it but can you guys help me find pictures or something of it, i tryed google but couldnt really get anything? thnaks! :)