Nothing of any note to ge honest.
As Simon says, it goes accross the Somerset levels, which may be designated an area of "outstanding natural beauty", but as I live in the area to me it is not particularly outstanding IMHO.
The "best" part of the levels are probably the old peat moores which have some great places to sit and watch wildlife particularly waterfowl.
If you like real "old shool" pubs there is a great one called the Railway Inn right in the middle of the Moores at a place called Meare.
I would say well worth a bimble in the summer months, in the winter the roads tend to be very muddy so best to avoid.
If you dont know your way around the levels you can spend hours riding around in circles !!