A wall mounted kaleidoscope is suitable for mounting within an opening passing through a wall, ceiling or other building structure to provide a visually attractive kaleidoscope display to a viewer within the building interior. A kaleidoscope housing extends through the wall opening and is mountable to the wall. A kaleidoscope mirror structure is mounted within the housing and includes three generally triangular mirrors arranged in the shape of a triangulated pyramid, with its base facing the viewer. A rotatable drum associated with the mirror holds loose articles for generating a kaleidoscope display; the drum may be rotated by an electric motor or manually. The light source may consist of artificial illumination and/or a light-transmitting cover which protects the structure from the elements.