I grew up near Wisbech - it isn't really that bad - but it is a place that seems to have lost its way (although I haven't been there for a few years). There was a major redevelopment of the town centre (paving etc) but many of the shops closed down. It seemed to not be able to compete with Kings Lynn and Peterborough.
Generally Cambridgeshire is 2 parts, the Fens to the north and the normal bit (for want of a better word) to the south of Cambridge. The Fens are very rural and agricultural, with villages approx 3-5 miles apart rather than the 1-2 in the rest of the county. They were drained from marshland. 2 types - peat fen - around Ely and Whittlesey - very black soil - to my mind very bleak. Silt fen - vey fertile brown soil - not so bleak. Both are very flat - can be beautiful in summer, can be very grim in winter. Prone to strong winds.
Don't know much about the south - very typical English countryside, pretty, very expensive because commuter land for London and Cambridge. The fens mainly have small market towns spaced 10-15 miles apart - eg Ely (nice cathedral), St Neots, Ramsey, Chatteris, Wisbech, Whittlesy. Then there is the Fen edge - just as it starts to get bumpy again - Huntingdon and Peterborough. Peterborough has expanded a lot in recent years and it now a big busy place.
Main roads are A1 (the Great North Road) on the west, M11 going up to Cambridge, and A14 going east-west via Huntingdon and Cambridge.
Train lines - east west - Peterborough - Ely- Norwich, north south Peterborough - Huntingdon - London (main east coast), King's Lynn - Ely - Cambridge - London.
Many of the towns and villages have lots of new development I think because land was/is relatively cheap.
Hope that helps.