Sprogø in the middle of Storebælt connects the Storebælt fixed link’s bridges and tunnel. The island measures 154 hectares and as part of the construction work quadrupled in size.
It has a rich animal life because it is home to a rare green toad and many types of birds. In collaboration with the authorities, A/S Storebælt has drawn up a conservation plan for the natural areas on the protected Old Sprogø in order to preserve the area’s salt meadows in such a way that Old and New form a coherent natural landscape.
From 1922 to 1961, the main buildings on the island housed a girls’ home where young girls were sent if they became pregnant outside marriage or did not conform to the moral code of the time.
The 24 m high Fyrbakke with its lighthouse is of historic interest and is protected. The lighthouse dates back to 1868 and is built on the remains of an old castle from 1167 built by Valdemar the Great. The ruins, which are the oldest dated fortifications in Denmark, were restored by the National Museum in co-operation with Sund & Bælt and are an attractive feature on Fyrrebakken. A book about the history of Sprogø and Valdemar’s castle was published in 2011.
In 1997, the light in the lighthouse was switched on again after having been off since 1980. The lighthouse, however, is of no practical significance to shipping.
Sprogø is unpopulated, but there is restricted access to the island for tourists on guided tours. These are arranged by Korsør Tourist Office and Nyborg Tourist Office.
Natural protected area
The Storebælt fixed link and Sprogø are located in a Natura 2000 area. Such areas are characterised by special forms of nature or animals which require a particular conservation effort. In addition, certain buildings on Sprogø are listed and nature conservation on the island is in accordance with the conservation plans for the island, which have been approved by Slagelse municipality.
On Sprogø, consideration is shown for the rare sandwich terns that live on the island. Sund & Bælt has good experience with improving the conditions of sandwich terns and increasing the number, i.e. through the control of herring gulls.