Yay, new words! Actually, a 'dendrological' garden is really just... an arboretum; an arboretum with lots of shrubbery in the mix. This fenced garden belonging to Poznań University covers over 20 hectares and features over 900 different kinds of trees (see how many you can hug), plus Europe's most valuable collection of raspberries and blackberries. Yum. Next door is the medical plant garden if you simply can't get enough of this stuff. To get there take bus 160 from 'Małe Garbary' to 'Wojska Polskiego.'