It’s actually my flickr Photo that someone used for the header of Monkey Island :-)

It does exist, it’s a small island off Hainan Island in China accessible only by ferry and cable car. The monkeys run wild(-ish) and will steal your food. There are little shows with monkeys for tourists.

It’s a leisurely walk around the park and a guide dressed up in traditional costume costs next to nothing. The guides don’t speak English, but are fluent in Mandarin and Hainanese. Some guides speak Cantonese too.