Lake Nicæa is a freshwater lake located in northwestern Turkey, near the city of Iznik. It is known for its scenic beauty and historical significance, as it was once the site of the First Council of Nicaea in 325 AD, which played a crucial role in early Christian history. The lake covers an area of approximately 30 square kilometers and is surrounded by lush greenery and hills. It is a popular destination for both locals and tourists, offering opportunities for fishing, boating, and enjoying nature. The lake's rich biodiversity includes various fish species and birdlife.