Bournemouth is a coastal town on the English Channel, 170km south-west of London. It is crossed by the river Bourne and bounded to the north and east by the Stour. Together with Poole and Christchurch it forms the south-east of the Dorset conurbation. The Bournemouth area has a climate considered mild for England, with less rainfall than inland and more frequent sunny spells. The mildness of this climate, exceptional in England, along with its large beach are the source of Bournemouth's success with tourists. It is also the "happiest town" in the United Kingdom according to a 2007 survey, which bodes well for a very pleasant time.