Keukenhof (Lisse)

Keukenhof needs 1 day: the world's largest flower garden, with over 7 million bulbs planted each year, is fully explorable in a single day. March-May is the only time of year it's open, coinciding with the blooming of tulips, daffodils and hyacinths. It's expensive by Dutch standards, with a high admission price and mandatory time-slot booking in high season. It's the world's largest bulb flower display, designed in 1949 to showcase the Dutch bulb industry's output, and its neighboring fields of blooming tulips are among the most photographed postcards of the Netherlands.