Ringkøbing Fjord, despite its name, is in fact a shallow lagoon on the west coast of Jutland.
On the Hvide Sande Canal in the middle of the isthmus, there is a floodgate that provides access to the sea to the west.
Ringkøbing Fjord was once affected by oxygen depletion, but today both plant and fish life abounds.
In the mid-17th century, the bank was near Sønder Havrvig, but it gradually moved south as sand was deposited on the shoal from the north.
On several occasions, the surrounding dunes collapsed from the effects of the water, causing the old outflow to fill with sand and creating problems for local fisherman.