A girl stands in the middle of a tulips field at the Keukenhof park, also known as the Garden of Europe, in Lisse, The Netherlands April 9, 2014. Keukenhof, employing some 30 gardeners, is considered to be the world's largest flower garden. REUTERS A girl stands in the middle of a tulips field at the Keukenhof park, also known as the Garden of Europe, in Lisse, The Netherlands April 9, 2014. Keukenhof, employing some 30 gardeners, is considered to be the world's largest flower garden. REUTERS