The Odvaskõ Cave is the favorite place of bats for mating, therefore this is protected by the law. There's a high rock above the cave, can be nice to get up there (in the summer when it's not snowy, of course).
Leave the car near N47 17.039, E17 42.602, 245 m, and go up on the footpath called "Boroszlán körút" (naming from a species of flower). At N47 17.347, E17 42.918, 365 m, turn to the right, follow the painted sign on the trunks of the trees (red cave on white background). The cache is in the hollow of an old tree, covered by bark.
After hiding the cache again, walk further to the cave. You can get back to the starting point by walking down the stairs. Enjoy the silence of the place!