Oh my god. This place is STUNNING. We went on a Friday afternoon, the sun was shining, the birds…read morewere chirping and the water was an incredible neon blue. I've never seen anything like it... Ethereal and mysterious and peaceful.
The area was crowded, but not enormously so. We walked around the water for a bit, then grabbed a lite lunch at the little cafe on the water (not great, but what tourist restaurant is?). There are tons of little hikes in the area, but we just walked along the Blau river away from the town and discovered this super quiet walk through the forest. Such a magical day.
If you're in the area, Blautopf is a must-do.