Tambunan Rafflesia Reserve
Near the top of the Crocker Range, next to the main highway 20km from Tambunan, is the Tambunan Rafflesia Reserve, devoted to the world's largest flower. The rafflesia is a parasitic plant that grows hidden within the stems of jungle vines until it bursts into bloom. The large bulbous flowers can be up to 1m in diameter. The 12 or so species of rafflesia here are found only in Borneo and Sumatra; several species are unique to Sabah, but as they only bloom for a few days it's hard to predict when you'll be able to see one.