SE18 is the place to visit for military history. Firepower, Royal Artillery Museum can be found in the Royal Arsenal and tells the history and development of artillery. Dial Square, also in the Royal Arsenal, was once the Royal Gun Factory, whose workers created Dial Square Football Club, which later became Arsenal Football Club. All that remains of the building today is an arch. There are also a set of old cannons on Frances Street, which once guarded a military base. The Royal Artillery Barracks has the largest parade ground in Britain and at over 1000 feet, boasts the longest façade in Britain. The shooting events in the London Olympics will occur here. Greenwich Heritage Centre, on Artillery Square displays the history of local life in Greenwich, by bringing together the Local History Library and the former Borough Museum. The centre features large collection of historical records, including maps and newspapers. As well as hosting a number of lectures and activities, it is a popular destination for school trips.For some art, visit Assembly, on Royal Arsenal Pier, which is a sculpture by Peter Burke and features 16 hollow body molds. The Thames Barrier can be found on Unity Way and is the largest moveable flood barrier in the world. There is a visitor centre, The Thames Barrier Information and Learning Centre, which offers a range of information and activities and includes a working model and fantastic views of the barrier. Waterfront Leisure Centre on High Road has a good range of facilities, including a water park with a slide, a wave machine, a waterfall and a hot tub. There are also a number of sports played in the centre and crèche facilities and classes available. Woolwich Common is an open natural space which allows locals and visitors to get away from the hubbub of the busy city and can be found next to the River Thames. Another attraction is Woolwich Thames Path just off Woolwich High Street. This walk along the river offers views of impressive structures, such as the Thames Barrier, the O2 (formerly The Millennium Dome) to name but a few.Woolwich Ferry on John Wilson Street dates back to the 14th century and ferries cars across the Thames for free. It exists because the river is too wide at this point for a bridge and is necessary to link the North Circular Road to the South Circular Road. It runs daily, every ten minutes. Another interesting and unusual way to get around is the Woolwich Foot Tunnel on Ferry Road, which runs from Woolwich Docks to North Woolwich, underneath the Thames.Woolwich Markets on Beresford Square and Plumstead Road, is renowned in London, with over 100 stalls, selling a huge variety of products. The market is most of the week, but is closed on Sundays.