The Line Modern Art Walk (Stratford to North Greenwich) walk

6.9 km (walked) plus 2 stops on the DLR and the Emirates Air Line cable car over the Thames

This walk makes use of the The Line – London’s first dedicated modern and contemporary art walk, which is fully waymarked and split into three parts, which are linked by a short DLR ride and the Emirates Air Line cable car across the Thames. It was meant to display a changing and increasing range of sculptures, all by prominent artists. There are currently about ten of them, but more funds have been difficult to come by.
The route initially follows the River Lea, passes Three Mills Green & Water Mill (the largest tidal mill in the world) and the Film and Television Studios (London's largest) and then – a little further along The Lea – Cody Dock, an interesting community project on a former Gasworks site. After a short ride on the DLR you reach Royal Victoria Dock and take the cable car across the Thames.
The route then finishes with a stretch along the Thames Path rounding the O2-Dome, before turning to North Greenwich Underground Station and the neighbouring wide range of eateries and waterholes on the plaza and inside the Dome itself.

the-line.org - official website

You can cut the walk short at Star Lane DLR/Canning Town tube stations (4.5 km walked distance) or at North Greenwich tube station (before rounding the O2-Dome, 6.1 km walked distance).

Miller’s House Café in the House Mill, Three Mills Lane, staffed by volunteers, usually open 11.00-16.00 weekends and sometimes also on weekdays
Cody Dock Café on the River Princess, Cody Dock, 11c South Crescent
Star Lane Pizza Bar, 12 Cody Road, open 15.00-23.00 Wed-Sun
The Cabin Café, Cody Road, open 06.30-14.00 Mo-Fri
Several options around Royal Victoria Docks
Plenty of options in North Greenwich, in and around the O2-Dome