From the rooms named after famous former guests like Marilyn Monroe and Humphrey Bogart to the Hollywood-style stars embedded in the exterior sidewalk, the Hotel San Carlos is proud of its past. But these days, the 83-year-old landmark in downtown Phoenix is probably best known for the various guests who may have checked out — but never really left. Yes, this hotel is a hotbed of haunted apparitions, including the ghost of a heartbroken young woman who jumped (or was pushed) from the roof while dressed in a full evening gown mere weeks after the grand opening. Then there's the basement, which features water wells dating back to 1874, when the site was home to Phoenix's first school house (and supposedly a sacred Native American watering hole before that). Which might explain why many guests report hearing the sounds of children playing in the basement, or even creepier, their screams echoing out of the well shafts.