Walking (or taking the furnicular) up Schlossberg is definitely a must when in Freiburg. Beware an…read moreexhausting walk up there though. And the lack of signage will make you wonder if you've chosen the right path up. And there is seemingly a gazillion paths to chose from. But it seems like every one leads to the top, so don't fret (like me, constantly chatting with myself in Swedish like a lunatic since I thought I'd gotten lost with noone around to ask directions from). Finally I heard lots of voices and realised I'd reached a viewpoint. Which turned out not to be the highest point, but still a great plateau to rest a bit and get some truly glorious panorama views of Freiburg itself but also the surrounding Schwarzwald mountains. I then continued up to another viewpoint, which I'm still not sure was the absolute highest point. But great enough so after that I ventured down on another path feeling very revived and grateful for a beautiful few hours spent. And meeting lots of panting walkers on their way up, while I practically jump skipped my way down the mountain. Nb, there is no castle on the Schlossberg no more, it was demolished hundreds of years ago. But still, it's a royal view and walk up there.

A beautiful park with a fairly large lake in the middle. There is also a running track with a…read morefootball pitch and a Japanese garden. The lake was once a quarry, so it is quite deep (82 feet) and the drop-off from the shore can be sudden and steep, so small children need close supervision. The west end of the lake is more friendly to smaller kids, with a large, shallower area. Otherwise, one can just jump in anywhere they like. Being Germany, there are no life guards or restrictions. People even dive and jump off the pontoon bridge. Also, being Germany, there is nudity. There is no official FKK site, but there is a small area on the north shore here that has become an unofficial FKK area. It is visible from the walking path that circles the lake and some people hang out in the area with bathing suits on, which would not be tolerated at an official FKK site. Still, plenty of people of all ages (including families) were comfortable enough to go au naturel when I was there, so when in Rome (or Freiburg)... If you're looking for a more private and/or egalitarian FKK experience, seek out a nearby lake with a sanctioned site. There is a Biergarten on site at the west end of the lake. The curry wurst is just ketchup with curry powder sprinkled on it but the prices are reasonable. There is a tower to explore and a stage right on the water where a traditional oom-pah band was playing for a bit. The southeast end of the lake is easily accessible by the #1 Tram and of course the entire park is accessible by bike. I don't know about car parking in the area.