One of the most beautiful hikes I made in my entire life. My wife and I did this hike in one day and it took around 10 hours – including time for rest and lots of pictures :). It's a tough one to do in one day, but definitely possible if you are reasonably fit.
https://www.alltrails.com/explore/trail/slovenia/bohinj/the-valley-of-the-seven-lakes-hike
by Pure_Shoulder6165