The Savoy Hotel located in Kansas City is one of the oldest continuously operational hotels in the united states. The Hotel & it's Restaurant Grill are both home to multiple specters of sorts. Haunted activity ranges from hearing whispers in a otherwise vacant elevator, to full on apparitions of a little Victorian girl. The Savoy Hotel is certainly one of the most haunted places in Kansas City.
Sources:
The Savoy Hotel & Grill - Wiki