Syltemade Valley, one of Denmark’s loveliest subglacial stream trenches, is situated in South Funen and its steep slopes are up to 20 metres high. The subglacial stream trench was formed during the Ice Age by melt water flowing beneath the ice where the deepest parts of the river are now the lakes Hvidkilde, Nielstrup and Ollerup. Many springs trickle out of the steep valley slopes and an abundant wild fauna lives along the river. The meadow areas are grazed to promote the growth of many different flowers in an area that also consists of marsh and woods.