I respect everyone's opinion, but I'm definitely against any sort of rides in zoos besides train/tram rides that take you to see animals. Modern zoos and aquariums should be centers for conservation education and scientific research, not theme parks. (*cough cough SeaWorld cough cough*). The presence of rides, in my opinion, makes the general public see the animals in the zoo as just there to entertain them in the same way as the rides. Not that going to the zoo should be boring- a good zoo is able to create engaging, enjoyable exhibits that entertain while educating. I'd be interested to see how much people learn at a place like Disney's Animal Kingdom or Busch Gardens vs. a traditional zoo. Plus, spending money on constructing and maintaining rides takes funds away from conservation and animal care. One exception I would make is for historic carousels. At least here in the U.S. a lot of zoos have historic wooden carousels that are made with really fine craftsmanship and represent a part of the zoo's history. I wouldn't automatically condemn a zoo for having roller coasters or other rides, but I definitely would prefer it if they didn't.