The Müritz (; from Slavic "little sea") is a lake in Mecklenburg-Vorpommern, northern Germany. Its area is 117 km², which makes it the second largest lake in Germany (after Lake Constance) and the largest lake located entirely within German territory. Its maximum depth is 31 metres (102 ft). It is fed and drained by the river Elde. Part of the Müritz and adjacent forests and wetlands are protected by the Müritz National Park. The former Müritz district was named after the lake. The biggest towns bordering the lake are Waren (Müritz) and Röbel, both major centres of tourism in the Mecklenburg Lake District. Lake Müritz is part of the Müritz-Elde Waterway, a Class I federal waterway. It is managed by the Lauenburg Waterway and Shipping Authority (Wasser- und Schifffahrtsamt Lauenburg).