Just got back from a holiday in Vancouver and Seattle.
The highlight was a whale watching trip with Wild Whales Vancouver. We were lucky enough to see plenty of wildlife and in particular a pod of transient killer whales hunting a porpoise, apparently witnessing such a thing is quite rare and it was definitely a great experience. We haven't yet looked at our own pictures from the day but a research vessel that was nearby got some super pictures which are available here. My favourite is:
Definitely recommend whale watching and Wild Whales Vancouver. It was also interesting to hear about the issues affecting killer whales around Vancouver and to find out that Canada isn't actually quite as enlightened on environmental issues as people in Europe might expect.