The ten most amazing trees. The shortest tree in the world is less than 5 cm tall. Some trees do not grow a leaf all year round. Some trees can produce honey-like sugar water, while some trees can produce salt. In Southeast Asia, there is a tree that can feed millions of people. On the island of Socotra in Yemen, there grows a tree that bleeds. In the tropical rainforest of South America, there is a tree that can actually walk. In this video, we bring you ten very amazing trees.