United Kingdom
Big (and heated) open air swimming pool, opened in 1929. Entry costs £4.60, but the pleasure of floating on your back and gazing at the sky is absolutely worth it. You can also sunbathe by the pool. Fabulous.
20-minute walk from Highgate tube, or Hornsey rail from King's Cross. Then a steep walk.
The lido is Europe's third biggest pool - 92m x 32m - with newly refurbished kiddie pool, cafe and changing facilities. Open all year if you're a member of the south London swimming club, but only swimmable by mere mortals between May and September. Arrive early on a sunny weekend with a copy of the Guardian to read and you're in a small part of heaven.
Tooting Bec Road, London, SW16 1RU; tel: 020 8871 7198; www.wandsworth.gov.uk/Home/LeisureandTourism/Leisurecentres/TootingBecLido.htm
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