Definetively in The Netherlands (in Holland <--- part of Netherlands)... and most probably in Keukenhof. The colorful Tulips are originally from Turkey (at least from the region nowadays called Turkey)... I think they were (or still are) called Tulbans. ¿Right?
Visited Keukenhof several times during the Tulip season; it's like being stoned without weed... well, I think, not that I know how it would be to be stoned...