Well..the op did ask about landscapes and after 5 or so months I hope he's found some.
The opportunity for great landscapes is not to good around Cambridgeshire but there are many other opportunities.
Here's a few places that might be of interest that I've found while travelling many many miles of Cambridgeshire roads...
Six mile Bottom, heading towards Haverhill there are a few chances to get shots back towards Cambridge.
Cambridge itself has many beautiful buildings, a good one is to park on the inner ring road and then walk across the river, and view the bridges, then into the grounds of Kings College.
Ely has quite a few places on the outskirts to get shots of the Cathedral.
Fen Drayton lakes (my current favourite) plenty of different lakes and lots of wildlife, great for sunrises and sunsets.
http://www.rspb.org.uk/reserves/guide/f/fendraytonlakes/
Gratham water and a bit further up the A1 Rutland water, again water, wildlife and sunsets
Barnack holes and holes...only small but very unusual (another favourite)
http://en.wikipedia.org/wiki/Barnack_Hills_&_Holes_National_Nature_Reserve
Here's an example..
Tree2 by
martyndt, on Flickr
Hinchingbrooke park on the Brampton road out of Huntingdon...walks through the woods, activities for the youngsters to stop them getting bored while you snap away, plenty of water and wildlife.
http://www.huntingdonshire.gov.uk/L...inchingbrooke Country Park/Pages/default.aspx
Another example...
Hinchingbrooke winter reeds by
martyndt, on Flickr
That's just a few I'm sure there's a lt more, Cambridgeshire...no hills, very flat but plenty of other opportunities