The "Lungs of London": take a break from the city buzz and head up to Hampstead Heath. To breathe in wide, open and green views, start from the wonderful lido at Gospel Oak; trot up Parliament Hill to marvel at the city stretching out from east to west below; continue round the fields and woods to Kenwood House and enjoy a well-earned break on their outside cafe terrace; play spot the bird or spot the dog as you jog gently back down (approx three miles round route). To add to your fitness experience and commune further with nature, stop off at one of the swimming ponds (one each for men and women on the east Highgate side, and one mixed pond near Hampstead entrance) or finish off with a few lengths of the lido! To enjoy all four pools, enter the Hampstead Heath duathlon in early September, running between swims in all the pools, starting at the lido and finishing at the athletics track.
www.cityoflondon.gov.uk/things-to-do/green-spaces/hampstead-heath for a trails map and details of events like the duathlon. Can be easily reached from Gospel Oak or Hampstead Heath overground stations or C2 bus from Oxford Circus or 214 from the City/St Pancras, stopping at Parliament Fields.