London Fields Lido

A dogged 18-year campaign by the London Fields User Group saved this 50-metre lido from demolition, and it reopened in 2006. After a nine-month refurb in 2017, it's looking swanky once again. Open year-round, it’s heated and well used: during busy holiday periods it closes at lunchtime between sessions to make sure as many people as possible can enjoy it. Picnicking is off-limits but there are two cafés.