In England and Wales, squatting—taking possession of land or an empty house the squatter does not own—occurs for a variety of reasons which include needing a home, protest, poverty, and recreation. Many squats are residential; some are also opened as social centres. Land may be occupied by New Age travellers or treesitters. Many squatters legalised their homes or projects in the 1980s, for example Bonnington Square and Frestonia in London. More recently, there are still isolated examples such as the Invisible Circus in Bristol.