The Regents Canal, once one of Britain's busiest commercial routes, is now an informative walk through widely differing areas. The towpath takes in Limehouse, Islington, Kings Cross, Camden, Regents Park and finally Little Venice near Paddington. Camden Lock is an ideal stop off for some shopping in the local market and a snack or drink.
Primrose Hill is an easy detour north for views over London and, passing through the north of Regents Park, if you time it right you can take in the feeding of the hyenas as you walk right through the middle of London zoo.
Start at Kings Cross by turning left and walking behind the station on York Way until the canal crosses you. Paddington station is close to Little Venice, where two canals meet.
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Guardian Travel adds: Kings Place, where the Guardian and Observer are based, overlooks the Regent's Canal and is just five minutes' walk from St Pancras. The canal is signposted from King's Cross/St Pancras tube station. The route will take one to two hours, depending on your walking speed.