It is called "Lokva pajicka" in Croatian. Here is an panoramic image of the "Lokva pajicka"
The cache is a small plastic box initially containing a log book, a book with sayings (in croatian), glass cleaning patch, GPS leash and 50 slovenian tolars. It is located on the right side of the road fifty meters before the pond (when you approach it from the Pajici village).
PS. Few geocachers started from the wrong side (OK, maybe not wrong but "longer" may be a better description :). I prepared two routes on how to reach the pond: