Riverside Theatre Works in Hyde Park, Massachusetts, is believed to be haunted by a ghost named Esmeralda, also known as "Essie". The theater is located at 45 Fairmount Avenue. Details of the haunting: Esmeralda is said to have died in a fire at the theater. Her spirit reportedly haunts the children who perform in plays. She has been seen floating above the stage. Essie is known for playing tricks with the lights during performances.