Go climb the mountain Ivančica, there are many people that come to take a hike to the top, where the Hunters house is. There you can have a meal, or just a warm cup of tea, great after 1.5 hour climbing.
There are three known ways to the top of the mountain: path Mrzljak, path Konj and can't remember the name of the third one.
Mrzljak is the easiest way, and Konj is the hardest.
However, if you're not in a mood to go through the forest searching for the marks that boy scouts left on the trees and stones, you can take the alternate way by car. But that is something i don't approve. Mountain is for climbing, not driving.
This tomb can easily be missed if you go to the top of the mountain by car. Watch for the sigh that say 70m to the grave. About 10min drive from the top.