1. The west bank of the Eden south of Wetherill: Constantines Cells, Corby Castle etc. Easy, if possibly muddy, walking
2. The source of the Eden at Mallerstang, between Wild Boar Fell and Mallerstang Edge, you could visit both on a long day or make 2 walks out of it
If you walk in those areas you'll pass two of the Eden Benchmark sculptures:
http://www.edenbenchmarks.org.uk/sculptures.htm3. Cautley Spout in the Howgills, start from Sedburgh and come back over The Calf
4. The 'other' Borrowdale, south of Tebay between the M6 and A6. Park near Low Borrowbridge and walk over Grayrigg Forest, Whinfell Common and Combs Hollow to High Barrow bridge, come back up the valley