Svenner is full of peculiarities and treasures. Besides the lighthouse that charms you with a wonderful environment and ancient culture, the archipelago Svenner is a very interesting landscape in several ways. Poor soil and harsh coastal climate provides Svenner a unique geological and botanical diversity. Svennerarkipelet unprotected and exposed islands are especially rich in form and surface with traces of scour stripes, fractures in the rocks, potholes etc. Svaberget has character both from the ice pressure, motion and gravity, and from sea forces. The flora is especially unique in Svenner. There are instances of species of hitherto not found elsewhere. It grows among other orchids next to wild blackcurrant bushes. The location of the seas allows a myriad of birds to use the archipelago as an airport. Large amounts of eiders, several colonies of herring gulls, svartbakk, and fish gulls nest on Svenner in May-June.
Remember to take your swimwear with you to Svenner. The water is clear and salty and you can swim through the rocks and islets in small narrow sound. Compared with other lighthouses, this ocean and surrounding area by the buildings sheltered from the worst winds. On sunny days it is so clogged with boats here that you can almost walk safely from boat to boat to cross the strait. There are several lit white sand beaches here in the inner sheltered bays.
The first lighthouse on Svenner, a square stone lighthouse, was built in 1874. In the fog they shot a cannon every 10 minutes. The gun is today the Norwegian Maritime Museum at Bygdøy. The current cast iron tower was erected in 1900 along with the buildings. The tower is 18.7 meters high, while the lighthouse reaches 40.3 feet above high tide.