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The Lea Valley Walk is a 50-mile (80 km) long-distance path located between Leagrave, the source of the River Lea near Luton, and the Thames, at Limehouse Basin, Limehouse, east London. From its source much of the walk is rural. At Hertford the path follows the towpath of the River Lee Navigation, and it becomes increasingly urbanised as it approaches London.

Waulud's Bank is a possible Neolithic henge in Leagrave, Luton dating from 3,000BC.The Waulud's Bank earthworks are in the North of Luton and are situated on the edge of Leagrave common, with Central Leagrave to the south east and Marsh Farm to the west. The River Lea runs alongside on the western side, its source located within the vicinity of the surrounding marsh.

Houghton Brook is a minor tributary of the River Lea. Houghton Brook starts in Houghton Regis and is fed by a number of smaller brooks in the area, mostly supplied by surface water from farmland and the various local villages and housing estates.The Houghton Brook starts behind the Pavilion on Houghton Regis Village Green and wends eastward though Houghton Brook flows through Houghton Regis, Lewsey and Hockwell Ring before joining the River Lea in Leagrave.

Knapps Brook is a minor tributary of the River Lea in Bedfordshire, England. The source of the river Lea is on Leagrave Common in Luton. It forms from a combination of brooks from East End, Houghton Regis and from the Lewsey Estate near the old Lewsey Farm. It joins the River Lea from culverts under the railway embankment and Toddington Road in Leagrave.