From topiary treasures to shallow trays of raked sand, climbing wisteria or scattered wildflowers - we're looking for the world's best gardens. Do you know an oasis of calm in an urban environment? A stately home with magnificently manicured grounds? A tucked-away corner hiding green-fingered genius? Check out our garden guide below, and if we've missed one you love, add your suggestions by sending a tip or emailing been.there@guardian.co.uk