The cache is not at the location given with coordinates, to find out correct cache location you have to solve this little mystery that I have prepared.
By solving mystery you'll get coordinates expressed in degrees, minutes and seconds (xx°xx'xxx'').
Drava Park Forest is in the northern part of Varaždin by the river Drava. It's protected area and it's home for numerous animal and plant species (logged 185 plant and 109 animal species). It's a nice place for a walk, picnic, barbecue, camping and recreation. Nearby there is a paintball club, kayak-canoe club, Lake Varaždin and city sport hall Varaždin where you can rent tennis, basketball or football terrains. If you like adventure or you just have extra time you might be interested in some of this:
http://www.archdaily.com/38064/city-sports-hall-ag-planum/
http://www.mura-drava.eu/en/bicycle-trail/along-the-drava/general-information_1
http://paintballvarazdin.com/naslovnica/
http://www.kkkvarteks.hr/
http://www.srk-varazdin.hr/onama.html
About terrain... it depends a lot of the season in which you'll come. Probably it's the worst in summer months (july, august) because it's the time when vegetation is pretty wild. They cut the grass from time to time and then is a great place where you can camp and have picnic, there are even few tables and benches but they somehow forget about it in summer... And as another star for terrain this year in the storm the tree fall in the way and they still haven't moved it... I hope it will all be done quick so you can start searching for this cache, I have placed it now because I'm not in Varaždin in autumn. So... that's it, I warned you :D good luck :)