Kathy is left off at the castle by the ghost carriage.
Halloweentown has a ghost carriage that takes you to the ghost castle where you can take the ghost "train" through their novel house of horrors. There are other rides and a dance floor where you can dance with the rats. They also have a spooky backstory that I'd tell you about, but ... my avatar never made it back from this sim. slurl.com/secondlife/Celebration%20Isle/217/189/26