The word "henge" is a backformation from Stonehenge, the famous monument in Wiltshire. Arbor Low is a well-preserved Neolithic henge in the Derbyshire Peak District, England. He also mapped the Avebury henge monument. During the early Bronze Age, barrow burials were performed on the site of Ferrybridge Henge. Nearby Luton has the Waulud's Bank prehistoric henge and Luton Museum & Art Gallery. Archaeological excavation of the central henge has taken place. Few henge monuments in the British Isles are as well preserved. Later additions include a henge and several stone circles. All of the largest circles were found in or near earlier henge monuments. Within the henge is a great outer circle. There also are two standing stones about away from the henge. The largest, at Kothingeichendorf, appeared to be "midway between a henge and a causewayed enclosure". The other, known as The Henge Shop, focuses on selling New Age paraphernalia and books.