I have always been a fan of a good zoo. I loved the Dublin Zoo, Franklin Park, Roger Williams and so on. Over spring break though, I went to the best zoo ever: The Brevard Zoo in Melbourne, Florida. We didn't technically go into the actual zoo, but we went over it.
They have this activity called "The Treetop Challenge." It is a ropes course combined with zip lines that take you around, through and over the actual zoo exhibits. We were close enough to the monkeys to reach out and touch them. We even zipped over the alligator exhibit!
It was a fairly challenging course and a little scary as we were at least 40 feet off the ground at any given point and connected by a harness, two carabiners, and a safety line. We had an "orientation"before we started that showed us how to safely connect to each line and how to attach the zip line contraption. The entire course took us about three, maybe three and a half hours. It involved walking across rolling logs, on wires, climbing up ladders, ropes and zip lining anywhere from 200 feet to 750 feet.
All in all it was one the most fun thing I've ever done at a zoo! I totally would have gone back a second time and if we go back to the zoo in the future, it will definitely be on my to do list.