Sequoias are some of the tallest and oldest trees in the world, primarily found in the western United States. They belong to the genus Sequoiadendron and can grow over 300 feet tall. These trees thrive in specific climates, often in mountainous regions with plenty of rainfall. The Giant Sequoia is the most well-known species, recognized for its massive trunk and thick bark, which helps protect it from fire and pests. Sequoias can live for over 3,000 years, making them one of the longest-living tree species on Earth. They play a crucial role in their ecosystems, providing habitat for various wildlife.