Reply to your question about Ghost Tour(0 answers)
I'll just write it to you directly, since it's not really related to the Spa topic.
The ghost tour covers ghost stories and legends Tallinn is famous for. So if you're into that kind of stuff then yes. The guides are great, I know them personally.
You can also join the Tallinn Free Tour, it starts every day at 12pm in front of the City Tourist Info Centre (Niguliste 2, in old town). You can just show up, no booking required. It's run by the same group that does the ghost tour.