The "Schwarze Beke" springs southeast of Schwarzenbek at Gut Melusinenthal, goes through the Rülauer forest, a fruit plantation area, and some grassland before the creek ends up in a pipe following the train tracks and anastomoses with the "Schwarze Au" which empties out in Aumühle in the "Bille" which anastomoses with a German main river the "Elbe".

Connection to Lübeck and Hamburg, main cities in the north of Germany, have been there early in Schwarzenbek's history.

Aubenas in France, Sierre in Switzerland and Zelzate in Belgium fraternized with Schwarzenbek in the year of 1955.

Schwarzenbek's size grew tremendously the past years and didn't stop growing ever since.

Schwarzenbek is the third largest city in district of Lauenburg and one of the parishes in the state "Schleswig-Holstein" after Geesthacht and Mölln.