The Singapore Botanic Gardens is a tropical garden located at the fringe of the Orchard Road shopping district in Singapore. It is one of three gardens, and the only tropical garden, to be honoured as a UNESCO World Heritage Site. The Botanic Gardens has been ranked Asia's top park attraction since 2013, by TripAdvisor Travellers' Choice Awards. It was declared the inaugural Garden of the Year by the International Garden Tourism Awards in 2012. The Botanic Gardens was founded at its present site in 1859 by the Agri-horticultural Society. It played a pivotal role in the region's rubber trade boom in the early twentieth century when its first scientific director, Henry Nicholas Ridley, headed research into the plant's cultivation. By perfecting the technique of rubber extraction, which is still in use today, and promoting its economic value to planters in the region, rubber output expanded rapidly. At its height in the 1920s, the Malayan peninsula cornered half of the global latex production. The National Orchid Garden, which is located within the main gardens, is at the forefront of orchid studies and a pioneer in the cultivation of hybrids, complementing the nation's status as a major exporter of cut orchids. Aided by the equatorial climate, it houses the largest orchid collection of 1,200 species and 2,000 hybrids.