Fetsund Booms

Historic log-sorting site on the Glomma — now an open-air museum and wetland nature reserve

At the mouth of the Glomma River where it meets Lake Øyeren, about 30 kilometres east of Oslo, lies Fetsund Lenser — a remarkable relic of Norway's timber industry. Established in 1861, the site used floating booms called "lenser" to sort and channel thousands of logs per day drifting downstream from the vast Glomma catchment, all without machinery — just water, timber, and human skill. Operations continued until 1985, when log driving on the Glomma was abandoned. Today the site is protected as a national heritage monument and open-air museum, part of the Akershus Museum network. Visitors can explore the historic sorting infrastructure along the riverbank and learn how the timber trade shaped Norwegian rural society for more than a century. The surrounding wetland reserve is also a haven for migratory birds, making it a rewarding stop for nature lovers year-round.