Binnenalster

Binnenalster
Inner Alster
The emblematic view from Lombardsbrücke Jungfernstieg and Rathaus in the background
Binnenalster
Location	Hamburg
Coordinates	53°33′18″N 9°59′42″E / 53.55500°N 9.99500°E / 53.55500; 9.99500
Type	artificial lake
Primary inflows	Alster (Außenalster)
Primary outflows	Alster (Kleine Alster)
Basin countries	Germany
Surface area	0.2 km2 (20 ha)
Average depth	2.0 m (6.6 ft)
Max. depth	3.0 m (9.8 ft)

Binnenalster (pronounced [ˈbɪnənˌʔalstɐ] ^ⓘ) or Inner Alster Lake is one of two artificial lakes within the city limits of Hamburg, Germany, which are formed by the river Alster (the other being the Außenalster). The main annual festival is the Alstervergnügen.

The lake has an area of 0.2 square kilometres (0.077 sq mi).^[1]