Kravice waterfalls, Bosnia and Herzegovina. I crawled behind the overgrown vegetation of one of the falls and the walls were covered with iridescent butterflies. Maybe the most beautiful thing I've ever seen.
Dvojno jezero (Double Lake) in Triglav National Park, Slovenia (by gregakapun).
Tolmin Gorge, Slovenia - I pretty much have this same picture, not nearly as pretty though. I believe its called "Bear's Head" being the shape of the rock stuck between kinda looks like a bear.