Illusion Trails - Sand City Maze

Using Unity 3d Version 5.6.0f3, Create a 3Dmaze that in the form of an ancient City that is 500x500. Priority 1 is that the world be interesting, but not scary or dark. World should have lots of trails and other walking features. World should have some animated features like flags or laundry blowing in the breeze and maybe a fountain with running water. Localized sound should be included for each area as appropriate. The world should have a variety of vegetation and animals. Supply a series of "Photographs" from picturesque points in the city and a screen capture of the whole world from high above the terrain. Street names and street signs are optional. Make sure that everything will run on a typical Android and iPhone.