The san diego zoo seems to straddle a canyon. Or gully? Either way we had to walk downhill and then uphill. So at the end of the uphill we opted to take the skyfari back to the beginning. Great view! I took a shot of the big church dome thing in balboa park just as a plane was flying by - sorry it doesn't show up better. We also took the tour bus - that's the way to see the zoo I say. It was quite the full afternoon.