The Mission Inn in Riverside, California is described as haunted by visitors who report a range of phenomena, including unexplained noises, flickering lights, and apparitions. Common reports include hearing piano music in empty rooms, experiencing cold spots, and seeing a woman in white in Room 330. The catacombs beneath the hotel, used to store art, are a particularly spooky area, with some reporting screams or visions of a young woman painting the walls. Other reported hauntings include Frank Miller and his sister Alice near the pool and the ghostly apparition of a woman traveling near the ceiling in the dining room. Room 330: Guests report seeing a "woman in white" who is believed to be a former resident. The Olympic-sized Swimming Pool: The spirits of Frank Miller and his sister Alice are said to haunt this area. The Bridal Honeymoon Suite: Guests have reported feeling pushed down the spiral staircase in this suite. The Dining Room: Eyewitnesses have seen a ghostly apparition moving near the ceiling. The Catacombs: A network of underground tunnels where the hotel's owner, Frank Miller, displayed his art collection, is rumored to be haunted by the ghost of a young woman. Some visitors and staff have heard unexplained whispers, sounds of children laughing, and a man's whisper. Unexplained noises, such as the sound of a bread wrapper, flickering lights, and cold spots throughout the hotel. Elevator doors opening on their own: to reveal a dark floor with no one around.