Roter Sand is a lighthouse in the North Sea, in the Weser estuary. It entered service in 1885. The light was deactivated in 1986 but the tower still serves as a day beacon. Roter Sand Lighthouse was the first building ever to be erected directly on the sea floor.On 1 October 2010, the structure was awarded the title "Historical Monument of Engineering in Germany" by the Federal Chamber of Engineers.
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Official Website http://www.roter-sand.de/
Coordinates 53°51'11.398" N 8°4'55.807" E