United World Colleges-Montezuma Castle, situated in Montezuma, New Mexico, occupies a building with a complex and layered historical narrative extending back to the nineteenth century and spanning multiple organizational entities and purposes. The structure, often referred to simply as Montezuma Castle, represents a distinctive example of large-scale historic architecture in the New Mexico landscape, constructed as a luxury hotel during the late nineteenth-century tourism boom that swept through New Mexico following the arrival of railroad infrastructure. The building was designed to accommodate wealthy tourists seeking the health benefits and scenic beauty associated with the New Mexico mountains, representing architectural ambition and commercial optimism characteristic of the era. The Montezuma Castle served as a prominent hospitality destination for several decades, hosting guests from across the United States and abroad who came to experience the region's natural and cultural attractions. The transition of Montezuma Castle from active hotel to alternative uses began during the early twentieth century as tourism patterns shifted and the building's operational viability changed. The structure subsequently served various functions including use as a retreat facility, an educational center, and eventually a property of United World Colleges, an international educational organization. The building's repurposing as part of the UWC-USA campus involved renovation and adaptation of the historic structure to accommodate contemporary educational functions, with modifications to interior spaces and systems designed to meet modern institutional needs. Despite these modifications and the building's transition to secular educational use, the physical structure retained distinctive characteristics of its original construction, including architectural elements and spatial configurations reflecting its nineteenth-century hotel origins. Paranormal phenomena at Montezuma Castle have been documented by investigators and campus residents, with particular concentration of reports emerging from the main tower and various corridors throughout the building. Apparitions have been reported by witnesses encountering translucent figures within the structure, with descriptions suggesting encounters with entities from earlier historical periods when the building functioned as a hotel or retreat facility. The most frequently reported apparition takes the form of a woman who appears in the main tower, particularly during nighttime hours, with investigators theorizing that this entity may represent a former proprietor of the building or a guest who experienced significant events during the castle's operation as a hotel. Disembodied voices have been documented within corridors and other interior spaces, with audio evidence suggesting the presence of intelligent entities capable of interactive communication. Unexplained sounds including footsteps, knocking, and other noises have been consistently reported in various locations throughout the building, suggesting ongoing spiritual activity despite the building's contemporary educational use. The specific identity of the primary apparition haunting Montezuma Castle remains somewhat unclear, though researchers have theorized that the woman appearing in the main tower may have been the proprietor or a long-term resident during the building's operation as a hotel or retreat facility. The particular attachment of this entity to the main tower may reflect significant experiences occurring within this distinctive architectural feature, or may suggest that the tower represented a location of particular importance to the spirit during her lifetime. The endurance of the haunting despite the building's transition to educational use suggests that the spiritual attachment transcends the building's contemporary function or occupancy, representing instead a persistent connection to the physical space itself or to significant historical events occurring within it. Today, Montezuma Castle functions as an integral part of the UWC-USA campus, serving as administrative and educational space for the international university. The building's paranormal reputation coexists with its role as a contemporary educational institution, creating an unusual intersection of academic function and spiritual phenomena. The structure represents a location where nineteenth-century tourism aspirations, hotel-era history, and ongoing paranormal activity combine to create a distinctive institutional and paranormal environment, attracting attention from both educational historians and paranormal researchers interested in the intersection of architecture, history, and supernatural manifestation.