Geograph - photograph every grid square

The Capital Ring is a surprisingly green route that encircles London. Distance is 78miles; it threads together parks and open spaces, mostly following pleasant residential roads in between. The route is an initiative of the London Walking Forum. The route is very well signed, with a Big Ben logo TQ1678 : Three walk logos, Gallows Bridge. The route is a walker’s equivalent of the North and South Circular roads. Link

The River Brent rises in Barnet and flows southwards to meet the River Thames at Brentford, a distance of 17 miles. The lower part of the river, from Hanwell is part of the Grand Union Canal.
Wikipedia: Link