I live in Colchester and would obviously choose our Zoo.
Lots of elevated view points; the Africa enclosure is second to none and it is extremely easy to set-up and get some great shots of Elephants, Giraffes and Rhinos; Also, the new Seal enclosure features a great underwater walkway in which you can really test your camera skills out in.
Also the Zoo rarely feels crowded and you have every chance of getting up close to all the animals.
