Arresø

Arresø is the largest natural lake in Denmark, situated in the northern Zealand region. It covers an area of approximately 39 square kilometers. The lake's origin dates back to the last Ice Age, formed by glacial meltwater. Its depth is relatively shallow, with an average depth of about 2.8 meters and a maximum depth of around 5.5 meters.

The lake is fed by several streams, most notably the Arrenå, and its outlet is the Bronholdt Å, which flows into the Isefjord. Arresø is a significant habitat for a diverse range of flora and fauna. It is a popular birdwatching spot, attracting numerous species of waterfowl, waders, and migratory birds. The surrounding landscape is characterized by forests, meadows, and agricultural land.

Recreationally, Arresø is used for sailing, fishing, and kayaking. Several small villages and settlements are located on its shores, including Arresødal and Ramløse. The lake and its surroundings are considered to be of natural and cultural importance.