If you want coastal, and like walking, try the Lulworth Range walks. Spectacular views with some demanding paths between Kimmeridge and Lulworth Cove, with Durdle Door close by.
However, the walks are normally only open at weekends and some holidays, as the army like to play with their toys the rest of the time. Also, stepping off the marked paths can have dire consequences.....
Have a look HERE for dates when the walks are open. You should be able to Google "Lulworth Range walks" and turn up lots of info and photos.
In the last few weekends, I've been lucky enough to to the stretch of the coast from St Albans Head to just west of Durdle Door. Loads of photos that I've been thinking of putting onto Flickr, but not got round to it yet.
Sore feet as well.....
If you go for it, do a bit of research about places to park and routes. The villages of Kingston, Tyneham (£2 all day), and Lulworth Cove (£5 all day) provide ideal spots for circular or "there and back" walks of up to 14 miles or so....