มหกรรมพืชสวนโลกเฉลิมพระเกียรติฯ ราชพฤกษ์ 2554
The exposition was classified in the A2/B1 class by the International Association of Horticultural Producers (AIPH). The exposition covered 470 rais or 185.82 acres of land at The Royal Park Ratchaphruek in Chiang Mai complete with numerous exhibitions, special events, and activities throughout the entire 3 months period. The 2 million plus visitors speak volume of the grandeur of this exposition.
