Giant Sequoias [wiki] (Sequoiadendron giganteum), which only grow in Sierra Nevada, California, are the world's biggest trees (in terms of volume). The biggest is General Sherman [wiki] in the Sequoia National Park - one behemoth of a tree at 275 feet m)
Researchers studying a remote section of the Pindos mountains in northern Greece have discovered a grove of ancient trees untouched for more than years. The dozen millennium-old trees, all Bosnian pines, include one specimen that first set down root
Dragon Blood’s Tree Dracaena cinnabari, the Socotra Dragon Tree or Dragon Blood Tree, is a Dragon Tree native to the Socotra archipelago in the Indian Ocean. It is so called due to the red sap that the trees produce
Large Boabab Tree - Also known as the "tree of life", Baobab trees, found in Africa and India, can live for several thousand years. They have little wood fiber, but can store large quantities of water.
Baobab: the common name of a genus (Adansonia) containing eight species of trees, native to Madagascar, mainland Africa and Australia. Also known as the Bottle Tree, the trees typically store around 300 liters of water and often live over 500 years.