Sheffield City Centre Kelham Island Quarter. In the 21st century it has become dominated by new office developments and apartment complexes. The Riverside Exchange and West Bar developments are a significant part of this change and have seen the area transformed dramatically. Also in this area is the St Vincent Quarter which lies on the opposite bank of the River Don to the Riverside Exchange area. The Sheaf Valley Area, surrounding the River Sheaf, is dominated by Sheaf Square/Sheffield Station and the Cultural Industries Quarter (CIQ). Sheaf Square, which has been completely redeveloped in recent years, now serves as gateway to the city
Sheffield city is in the eastern foothills of the Pennines, and the valleys of the River Don and its four tributaries, the Loxley, the Porter Brook, the Rivelin and the Sheaf. Sixty-one percent of Sheffield's entire area is green space, and a third of the city lies within the Peak District national park. There are more than 250 parks, woodlands and gardens in the city, which is estimated to contain around 4.5 million trees. In the 19th century, Sheffield gained an international reputation for steel production. Known as the Steel City, many innovations were developed locally, including crucible and stainless steel,