sentences:  Close to Cheshunt railway station is the Lee Valley Youth Hostel.A glimpse of the Small River Lea can be seen which flows nearby under Windmill Lane.Past Waltham Common Lock and then Waltham Town Lock which is adjacent to the Showground Site the chosen venue to host the 2012 Summer Olympics canoeing and kayak slalom events will be known as the Broxbourne White Water Canoe Centre.