Places to visit

Tulips and Keukenhof
Keukenhof is an exhibition held every year near Lisse and Hillegom. They have a very good website in English and nine other languages. It is open from the middle of March until middle of May. You can find the exact dates on the website. Tulips tend to appear late and the best time is about the last week of April.
The ING does not run any excursions to Keukenhof. You can easily get there by train to Leiden and bus. You can buy and print you own tickets through the website. If you take your bicycle on the train you can cycle round the surrounding bulb fields. It gets very busy on a fine weekend.
You can also rent a bike at Keukenhof. You may not ride in the exhibition but you can use it to cycle round the fields nearby.

For more inspiration, visit and Lonely Planet.