Sydney harbour bridge walk

I took the memory card out of my camera today and found these photos I took when I was in Sydney in February to apply for my Finnish passport.  It wasn't the nicest of days in Sydney that day but it was interesting to see the people doing the bridge walk.  I took these from the ferry.  Even in the photo with the opera house beneath the bridge you can still just make out the people walking along the arch of the bridge.  They look like tiny dots beneath the patch of blue sky on the right.   I don't think I'd be game!