Technical Instructors Finland
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Ojamo lime mine is situated 60 kilometers west of Helsinki. The mine area is part of the city of Lohja, known for its industry. The mining operations were started in the 18th century. Ojamo mine has been dived for almost 40 years.More information: Ojamon kaivossukeltajat
Some fishes are seen there as quarry is connected to lake Lohja. Pearch and pikes are seen quite often in shallow open water close to the lake but not on tunnels.