I didn't vote in this poll because there are great zoos on all continents (except Antarctica of course)! I'd say the general consensus is that Europe and North America are the 2 best zoo continents, but Australia has some good ones and Asia has the Singapore zoos In North America some of the best zoos include the San Diego Zoo, Omaha Zoo, Bronx Zoo, Miami Zoo and many more. Europe has Chester, Prague, Burger's, the Berlin's and absolutely loads more. Australia's marquee zoo is the Taronga Zoo in Sydney, but some other good ones include the Melbourne Zoo, Perth Zoo and Adelaide Zoo. I'm not too sure about Asia, other than that the multitude of zoos in Singapore (Night Safari, Singapore Zoo, River Safari, S.E.A Aquarium and the Jurong Bird Park) are probably the finest Asia has to offer. I'm not sure enough about African Zoos to comment.