Best place to find work teaching English in Serbia?

Hello All!

I'm an American English teacher who is currently living and working in Kiev, Ukraine. I will be traveling throughout Europe this summer, but afterwards (in late August or early September), would quite possibly like to settle down in some Serbian city or town. In your opinion, which place might be best for me in terms of both teaching possibilities and attractions, including nature?

My top priorities in finding a good city or town are:
1.) Good opportunities to teach English, ESPECIALLY FOR PRIVATE COMPANIES (including finding students for private classes) and ability to find them fairly quickly
2.) A place surrounded by beautiful nature (including easy access to forests, lakes, and/or mountains)
3.) Good recreational opportunities, such as hiking

Please note that I am aware in general of the economic situation in Serbia, but would rather focus on positive possibilities. Feel free to send me a private message. Thanks in advance!

David