Terrain, waters and landscape Geography 12 items Mountain 1 Mountain Harburg Hills Located in the southern part of Hamburg , the Harburg Hills feature the city's highest natural elevations amidst dense forests. Plain 1 Plain Grootmoor Nature Reserve Grootmoor is a protected peatland plain in northern Hamburg , hosting rare bog plant communities. River 2 River Elbe River The Elbe River is the lifeblood of Hamburg , creating a massive port ecosystem before flowing into the North Sea. River Bille River The Bille River is a right tributary of the Elbe, meandering through the eastern quarters of Hamburg amid green banks. Lakes 2 Lakes Alster Lake Located in the heart of Hamburg , Alster Lake is divided into the Inner Alster and Outer Alster, forming a central recreational hub. Lakes Öjendorf Lake Öjendorf Lake is situated in eastern Hamburg , serving both as a bird sanctuary and a swimming lake. Forest 1 Forest Niendorf Enclosure Situated in northwestern Hamburg , the Niendorf Enclosure is an ancient woodland park featuring majestic beech trees. Stream 1 Stream Osterbek Stream The Osterbek is a urban stream flowing through Hamburg , connecting residential quarters to the Alster Lake. Picnic area 1 Picnic area Planten un Blomen A large urban park located in the center of Hamburg , renowned for its vast green lawns and botanical gardens. Museum 1 Museum Miniatur Wunderland Located in the historic Speicherstadt district of Hamburg , Miniatur Wunderland is the world's largest model railway museum. Historic sites 2 Historic sites Speicherstadt A UNESCO World Heritage site, Speicherstadt is the largest warehouse district in the world, located within the port of Hamburg . Historic sites Hamburg Rathaus The historic Neo-Renaissance city hall hosting the local parliament and senate of Hamburg .