Maksimir Park was built in the 19th century, and from that period he's gathering attention because of his esthetic, the way it was built but also because of the cultural and ecological variety. Every day, no matter the season, we can see different people walking in the park with different interests, some of them are coming to explore the flora and fauna, some because of the recreation and some people just want to relax. In the complex of Makismir Park is the ZOO which gathers all kindds of people who want to learn more about the animal world. Except from the ZOO, the lakes of Maksimir also attracts big attention and leaves some people fully surprised and admired. Although Maksimir is near the centre of the city it presents a big cultural, historical and ecological wealth. After carefully studying the park not everything is all that good. Althought the park is protected, every day people throw their garbage on the sidewalks, meadows, bushes and even in the lakes. Examining the park and the beauty of nature, we can very easy see that there is a significant grade of euphrofication in the lakes. The presumption is that the euphrofication is caused by natural and anthropogenic influence. The question is how that 'pollution' affects the flora and fauna of the lakes and the whole park. Today we know a few successful methods of purification the lakes so I don't doubt that the conditions of lakes and the nature will get any worse, infact I expect the opposite.