They've just featured this on Newsround, unfortunately with obligatory beardy Druids, standing in circles and muttering on about sacred places and energies....I'm sure that will have enthused the kids into voting! ;-)
Stonehenge got my vote even though i'm a tad anti stonehenge(not anti something else maybe) I'd vote for Arbor Low a hundred times or swinside or long meg or callanish or brodgar or etc etc