The oldest and perhaps most impressive burial mound on Møn is Grønsalen near Fanefjord Church. The 100 m by 10 m barrow is from around 3500 BC. According to legend, it is the resting place of Chief Grønjæger (Greenranger) and his wife Queen Fane, after whom Grønsund and Fanefjord were named. There are also barrows at Raaby and Busemarke. There is also a 5,000-year-old round burial barrow at Sømarke, and others at Jættestue and Jordehøj. Kong Asgers Høj at Sprove is the largest gallery grave in Denmark, more than 4,000 years old. It has been fully excavated and can be visited inside. There is another round barrow at nearby Rundysse, and a further recently restored 9 metre long double passage gallery grave at Klekkende Høj from the Neolithic age c. 4,500 years old.