The term 'Big Tree' can refer to three different types of trees: the ELM, REDWOOD, and Giant Sequoia. The ELM is a deciduous tree that is native to Europe, Asia, and North America. It is known for its tall, straight trunk and its ability to withstand strong winds. The REDWOOD is a coniferous tree native to the Pacific Coast of North America. It is the tallest tree species in the world and is known for its long life span. The Giant Sequoia is a coniferous tree native to the Sierra Nevada Mountains in California. It is the most massive tree species in the world and is known for its thick bark and resistance to fire.