to get to the sinnott building, visitors follow a short, stairstep trail from rim village to the entrance. the entrance door opens to a 40 foot by 40 foot observation room. on the north side of the room, an open-air balcony offers visitors a spectacular view to the lake. the balcony is covered by a cantilever log roof. the museum exhibits are located in the center of the observation room and around the walls. the exhibits highlight the geologic history of mount mazama and the formation of crater lake. there is also a hidden 12 by 14 foot workroom adjacent to the museum space. a door on the east side of the room leads to the exit stairs which is hidden from view by a stone wall.