Mojave.
Trust me, there are better places to see flat marshes than Essex. The problem is that whichever way you turn, there's an electricity pylon or a fence or a mobile phone mast or a road. The number of man-made obsceneties is just awful. How I crave some open space and a bit of wilderness.
My wife and I are off to the Isle of Skye for the last two weeks of September. Okay, there's "civilisation" up there but you can get an entire beach to yourself if you want one and just sit and watch the tide come in and out without some snot-nosed kid and his entire family plonking themselves down next to you. Does that sound anti-social? If so, sorry, 'cos I'm not - I just value a bit of quiet once in a while....
If you come to England head for the Northumbrian coast - north of Newcastle Upon Tyne (well north of Blyth actually). Miles and miles of stunning beaches, ruined castles and rolling hills. England's best kept secret.