Geograph - photograph every grid square

The River Glen is a tributary of the River Welland. It flows entirely through Lincolnshire, except a short stretch near Essendine in Rutland. Wikipedia: Link

A 290 mile route devised to raise funds for Macmillan Cancer Support to which all proceeds are donated. It runs along sea banks and river banks, from Boston, across the Lincolnshire fens via Stamford, eventually to Abbotsbury on the Dorset Coast. From the fens it follows, as near as possible, the course of the oolitic limestone belt, called 'Cotswold' stone in that area, but found in slightly varying form from South Yorkshire to Dorset.
The Way provides a link with the Viking Way at Oakham, the Thames Path National Trail near Thames Head and with the South West Coast Path National Trail at the finish. It also has a Macmillan Way West (Link ) from Castle Cary to Barnstaple.

The Fens, also known as the Fenland, is a naturally marshy region in eastern England. Most of the fens were drained several centuries ago, resulting in a flat, damp, low-lying agricultural region.
A fen is the local name for an individual area of marshland or former marshland and also designates the type of marsh typical of the area, which has neutral or alkaline water chemistry and relatively large quantities of dissolved minerals, but few other plant nutrients.
Fenland primarily lies around the coast of the Wash; it reaches into four counties: Lincolnshire, Cambridgeshire, Norfolk and a small area of Suffolk, as well as the historic county of Huntingdonshire. In whole it occupies an area of nearly 1,500 sq miles.
Most of the Fenland lies within a few metres of sea level. As with similar areas in the Netherlands, much of the Fenland originally consisted of fresh- or salt-water wetlands, which have been artificially drained and continue to be protected from floods by drainage banks and pumps.