Gulhane Park, once the imperial garden of the Topkaper Palace, is now a free open park. The end of March and the beginning of April are the most beautiful time in the park, as the International Tulip Festival in Istanbul is being held in the park. Tulip is the national flower of Turkey. Now when it comes to tulips, the first thing people think about is the Netherlands. In fact, the Dutch tulips are also passed down from Turkey. In early April, when Turkey's tulips opened, tulips of various colors could be seen in the streets of many cities.