We took a ship's KGB tour. We finished at the Resistance Museum (highly recommend and it was the reason we took the tour as it is closed on Mondays when we were there but with the tour you get in). They dropped us off at the spot where the shuttle drops people off at the end of the tour as we requested that (so we would know where the shuttle stops). Then we explored the old town. It was really interesting, though the only thing we did was eat. We had lunch at Old Hansa because we wanted to try Estonian food. It was really good. Then we just walked around a bit. Totally safe feeling place.