The Keukenhof features a variety of different gardens and garden styles. For example, the English landscape garden features winding paths and unexpected see-through points. The historical garden is an enclosed garden where you can see many old types of bulbs.
"'They said Amsterdam is lovely in the beginning of May. They proposed leaving May 3rd and returning May 7th. I found my Wish.'" (5.90) Amsterdam has always been a place that Hazel wanted to visit, because it was where her favorite author lived. I think that it was one of the most important places in her heart, especially because Gus' used his wish to make her happy.