We're going there for the 1st time ourselves in Sept., so everything I'm telling you is what I've read in travel books I got at the library. We were in Niagara Falls Canada 2 years ago, & I'm fairly certain they took American money, but not sure now.
The Capilano Suspension Bridge looks like a neat place to check out in Vancouver; however, it's not free. The Lynn Canyon Suspension Bridge park does not charge admission. Stanley Park looked like a nice, pretty area to walk around in. Also, my travel agent says Robson Street has lots of shopping.
Hope this helps. We are looking forward to seeing this city also the day before our cruise leaves.