Some of humanity’s most riveting (and, yes, repulsive) real-life dramas have played out behind the ornate facades of some of the world’s great hotels. If a brush with infamy, mystery, or even murder is what you seek this Halloween, book an inn-famous stay at one of our favorite properties: We’ve even divulged some of the fabled room numbers and noted what you can expect from these storied hotels, should you plan on making some history of your own.