Holzmaar, Volcanic maar lake in Gillenfeld, Germany.
The Holzmaar covers 6.8 hectares with a diameter of 325 meters and reaches a depth of 21 meters in the Volcanic Eifel region.
Scientists have extracted sediment cores from Holzmaar dating back 23,200 years, revealing significant data about climate changes through geological periods.
The German Research Center for Geosciences in Potsdam conducts regular studies at Holzmaar to analyze water parameters and sediment composition.
Visitors can access the lake and its surrounding nature reserve throughout the year, with no entrance fees or time restrictions.
A green monitoring buoy floats on the lake surface, continuously measuring water conditions and algae growth at multiple depth levels.
Location: Gillenfeld
GPS coordinates: 50.11890,6.87917
Latest update: March 3, 2025 00:03
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