Well kept free zoos

[HyakkoShachi]

So I came across this video on youtube of a zoo in Japan that seems well kept and is appearently free.

So it got me thinking,how many free zoos are there and are also worth visiting?

 

[Blackduiker]

Standout free zoos here in America would have to be the Saint Louis Zoo, which I have visited and the Smithsonian National Zoo in Washington D.C. which I have not visited.