Introduction to Giant Tree Island: There are several Northeast giant trees, Big Green Poplar, on the island, with a maximum diameter at breast height of 2.4 meters. They have lush branches, broad and straight branches. Most of the trunk of a Big Green Poplar tree by the river is dead, but the tree is still alive. There are many tender branches and leaves growing on the top, which is so amazing that it is called the "sacred tree".