Teufelssee

Berlin has a genuinely casual relationship with public nudity, and Teufelssee in Grunewald is where that shows up most plainly outside the city's official FKK-zoned parks. It's a small glacial lake — 2.4 hectares, carved out during the last Ice Age — tucked into pine forest a walkable-or-bikeable distance from the Grunewald or Heerstraße S-Bahn stations, and on a warm day its southern shore fills with a crowd that treats clothing as fully optional.

What the "FKK" label actually means here

Teufelssee isn't officially signed as a Freikörperkultur (free body culture) zone the way some designated Berlin lakes are — but in practice, nudity is tolerated to the point that it's unremarkable to see naked bathers alongside people in swimsuits, sharing the same lawn and the same roving snack vendor. Two independent current guides — Playful Mag's 2026 FKK roundup and planet-randy.com's dedicated writeup — both describe it this way: mixed-use by default, no one checking what you're wearing or not wearing. That's a genuinely different arrangement from a strictly-enforced nude beach, and worth knowing before you go if modesty norms matter to your plans either way.

What's actually there

The bathing area on the southern shore is a proper lawn for sunbathing plus a swimming zone monitored by a DLRG (German lifesaving association) water-rescue station in season — a real safety detail rather than just lake ambience, per Berlin.de's own tourism page. There's no admission fee and no booking system; you show up, find a spot on the grass, and swim. What there isn't: changing rooms, showers, or much beyond the lake itself and the forest around it, so bring what you need rather than expecting facilities.

Getting there and what to expect

The approach is part of the appeal — roughly 15 minutes by bike or 30 minutes on foot from Grunewald or Heerstraße S-Bahn, through pine forest that makes the lake feel more remote than it actually is for a spot this close to central Berlin. Reviews and hiking write-ups describe exactly the crowd you'd expect on a hot Berlin weekend: a mix of naked twenty-somethings and long-time FKK regulars who've been coming for decades, sandy edges, and the specific quiet of a forest lake rather than a beach-club scene. Go on a weekday if you want it closer to empty; a warm Saturday afternoon will not be that.