Located on a hilltop within the Singapore Botanic Gardens, the National Orchid Garden displays the world's largest and strangest collection of tropical orchids, as well as some bromeliads and carnivores. This garden has an amazing design. Orchids are arranged on the basis of a color scheme that reflects the four seasons; Cream or yellow orchids symbolize spring, pink and red orchids represent summer, white orchids represent winter and purple and red orchids represent autumn.