22. Castles of the Shropshire Marshes
A four-night, self-guided stroll through the bucolic rolling borderlands between England and Wales, this majestic ramble covers 36 miles between quaint Bishop's Castle and foodie Ludlow. Following ancient drovers' trails along sections of the Shropshire Way and Offa's Dyke, it passes villages, castles and hillforts.
Details: Prices start from £310 per person (inntravel.co.uk)