The final 20 miles through central London to Greenwich and the Thames Barrier is very built up.  It is full of fascinating historic and modern buildings, bridges, docks, palaces, monuments and sculptures.  The Thames Path can be walked on both banks of the river through London from Teddington to the Barrier.  Walking both banks of the Thames Path through London adds another 32 miles to the route making the full walk almost 215 miles.  A recent 10 mile extension has been added to the path from the Thames Barrier to Crayford Ness where Greater London ends.  There are no photographs of this new section here.