Like the rest of the Channel Islands, Guernsey is steeped in history. Up to 6,500BC, the islands were in fact part of the French mainland until the Ice Age came to an end. Discoveries in the 20th century have shown evidence of mankind dating back to 5,000 BC (New Stone Age) when tribes, possibly from Spain moved here. All around Guernsey are traces of neolithic man, including defensive earth works, menhirs and dolmens. These are burial chambers built above the ground and several survive in remarkably good condition. The largest in Guernsey, La Varde Dolmen is near the 17th green of L'Ancresse golf course and measures 11 metres long by four metres wide and has a capping stone pile of five metres long and one metre thick. One cannot even start to imagine how early man could have moved such stones into position. Further dolmens can be found at Hougue de Dehus, which has a burial Chamber of for 10 metres by 1.5 metres , Le Creux es Feies (the fairy grotto) and Le Trepid near to Le Catioroc which Victor Hugo claimed was haunted by the cries of women waiting for their lover, the devil. As mentioned in the section on churches, human figures carved out of granite have also had survived from around 2500. Celts probably from France and Germany, from around 800BC have also left their mark.