- Hydra in Augsburg
- Hydra in Bayreuth
- Hydra in Bensheim
- Hydra in Bocholt
- Hydra in Bochum
- Hydra in Bottrop
- Hydra in Bremen
- Hydra in Bremerhaven
- Hydra in Emden
- Hydra in Gummersbach
- Hydra in Homburg
- Hydra in Ingolstadt
- Hydra in Konstanz
- Hydra in Krefeld
- Hydra in Leverkusen
- Hydra in Limburg an der Lahn
- Hydra in Lippstadt
- Hydra in Moers
- Hydra in Mönchengladbach
- Hydra in Nordhorn
- Hydra in Oldenburg
- Hydra in Osnabrück
- Hydra in Rheine
- Hydra in Rostock
- Hydra in Saarbrücken
- Hydra in Sigmaringen
- Hydra in Speyer
- Hydra in Troisdorf
- Hydra in Uelzen
- Hydra in Waldshut-Tiengen
- Hydra in Weimar
- Hydra in Weißenburg in Bayern
- Hydra in Wismar
- Hydra in Worms
- Hydra in Würzburg