The tallest trees in the world are known as coast redwoods, specifically the species Sequoiadendron giganteum. These magnificent trees can reach heights of over 350 feet (107 meters) and are primarily found in the coastal regions of northern California. Their impressive height is attributed to their unique growth patterns and favorable climate conditions. Another remarkable species is the mountain ash, or Eucalyptus regnans, which can also grow to significant heights, often exceeding 300 feet (91 meters). These trees thrive in the temperate rainforests of southeastern Australia and are known for their rapid growth and resilience in various environments.