No-ones mentioned the whales out of Victoria, so I will. Fantastic killer whale watching. We went out with Prince of Whales in May, had to invoke their 'no-whales, go standby for free' thing, but had excellent views on the second trip (they were playing!), and the zodiac can be really good fun too

One thing I haven't managed to do yet it to take the sea plane trip from Vancouver to Victoria.. it's not too expensive, I don't think you get miles, but there's a regular scheduled service, and it looks like it would be fun