From its relatively narrow entrance from the Kattegat at Hundested and Rørvig, branches of Ise Fjord stretch 35 km inland and divide the northern part of Zealand into the peninsulas of Odsherred, Hornsherred, and Nordsjælland.

The river valley of Ejby north of Roskilde near Ise Fjord is a nature reserve with many rare plants.

[4] Ise Fjord is also remembered for its 15th-century artists who decorated many of the region's churches with frescoes (kalkmalerier) depicting stories from the Old and New Testaments.

A good example is Tuse Church near Holbæk in northwestern Sealand, which is richly decorated with both Romanesque and late Gothic murals.

Here the life of Jesus is particularly interesting as it combines the biblical accounts with images of kings, devils, and women brewing beer.