On the first day, we had pre-booked tickets last October to the Nova Scotia Tattoo which is a three hour superbly choreographed show with military bands, bagpipers, dancers, choirs, and much, much more. We walked from the ship to the Scotia Bank Center in about 30 minutes. Tip: Follow Google Maps walking directions as what appears to be the most logical way ends with a very steep climb. The ship offered a similar tour, but we had much better seats for less than half the price and the bus transport took about the same time as traffic around the event was very heavy. That evening we walked back to the Citadel for the fireworks show. The show itself only lasted about 10 minutes - a disappointment for Canada's 150th Birthday.
The second morning we took the Peggy's Cove and Titanic Tour (HX67). We departed in a torrential rain, but it shifted to fog as we left the city. Our guide was excellent providing lots of information and took time to visit/respond to questions with each person on our way back from Peggy's Cove. The fog was quite heavy and you could barely see the ocean from the lighthouse. This was an excellent tour that would have been outstanding if the weather had been better.
Read BSinPNS's full Celebrity Summit cruise review