Kymijärvi is a lake located in southern Finland, primarily in the Kymenlaakso region. It is part of the Kymi River system and is known for its scenic beauty and recreational opportunities, including fishing and boating. The lake is surrounded by forests and offers a habitat for various wildlife species. The lake is also significant for local communities, providing water resources and supporting tourism. Nearby towns, such as Kouvola and Kotka, benefit from the lake's natural attractions. Kymijärvi plays a role in the region's ecosystem and contributes to the area's cultural and economic activities.