Narrator: Here at Keukenhof, 7 million bulbs are planted by hand in just three months. Spread across 80 acres, it's one of the world's largest spring flower gardens, with 800 varieties of tulips.

Keukenhof is open for only a limited time, from mid-March to mid-May. The best time to visit is in April, when tulips are in full bloom. However, peak bloom varies each year due to weather conditions.