Holme Fen is located in the county of Cambridgeshire, England, and is supposed to be the lowest land point in UK, at 2.75 metres (9 feet) below sea level. The fens included many shallow lakes, before drainage, of which Whittlesey Mere was one of the widest. It is also the greatest Silver birch woodland in lowland UK. It includes about 5 hectares (12.35 acres) of rare acid grassland and heath and a part of remnant raised bog. There is a large range of wildlife to see, including woodland birds, the odd shapes of fungi and a couple of rare species of plants. There is a way-marked path which begins at the Holme Post.