The National Exchange Hotel in Nevada City, built in 1856, is described as haunted by several reports, including full-body apparitions of men in old-fashioned clothing smoking cigars, and unexplained physical interactions like sheets being tugged, headboards vibrating, or a light pressure on the back. Other reported phenomena include inexplicable sounds, doors opening, EVPs (electronic voice phenomena) of voices saying "light goes on" or "twenty-two," and even a teddy bear used for paranormal investigation lighting up. These occurrences are attributed to the hotel's rich Gold Rush-era history, which included serving as a significant social and business hub. Guests have reported seeing full-body apparitions of men in 19th-century attire, often seen in the lobby. Guests have experienced sheets being pulled, headboards vibrating, and a sensation of light pressure on their backs. In some cases, doors have been opened by unseen forces. Unexplained noises and sounds have been reported. Voices have been recorded saying phrases like "light goes on" and "twenty-two". During investigations, a rem pod teddy bear has lit up, suggesting a paranormal presence. The hotel dates back to 1856 and was a central hub for Gold Rush miners and travelers, including Mark Twain.