The main attraction is a narrow suspended bridge high above a river that takes you from the highway side of the river to the forest side, where there are lookout spots, a birds of prey exhibit, and lots of steps, tree platforms, and mini-suspension bridges to climb amongst the trees. The main bridge has a tendency to sway a lot under two-way traffic, with heavy humans staying to one side or the other. My mom tells me my siblings and I were all afraid of this bridge as kids. Well, I'm still afraid of it as an adult (especially with wise-ass teenagers on it thinking it's fun to jump up and down).
After a nice nature walk/climb, D and I headed back into the city and had lunch down in Gastown, then returned to Stanley Park to visit the Vancouver Aquarium. This is a very active aquarium with Sea World-like shows and exhibits. We saw everything from whales to sharks to penguins to otters to frogs to jellyfish. Quite worth the trip.