Bit of a landscape desert around there or more correctly desolate fenland vista,
Best bet would be the Lincolnshire Wolds and that's it unless you like big skies and did I mention fenland.
North Norfolk coast has some cliffs, Old Hunstanton isn't too far, any interest in architecture type stuff?
Some old towns and cities within reach namely Lincoln and Peterborough, Kings Lynn also has some interesting buildings.
More local people might offer up some suggestions, but can't say I have found anything very inspiring nearby.
Even Alan Partridge got a dig in when he mentioned his radio station coverage being from Spalding to Lowestoft.
Spalding does have a nice museum with a decent cafe in its grounds and more strangely a pie and mash shop in the town.
Given the large eastern European population I found that a rather peculiar choice of eaterie