Wellenwerk opened in 2019 as Berlin's first indoor surf spot, tucked into Lichtenberg with a nine-meter-wide CityWave pumping out a consistent standing wave regardless of what's happening outside. It's built for the full range, from complete beginners booking their first lesson to experienced surfers logging laps they can't get anywhere else in the city. Being fully indoor means no flow, weather, or season to plan around—just book a session and go, any time of year. Around the wave there's a restaurant, surf shop, bar, and beer garden, so it's as much a hangout as a surf check.