Some seaweeds are the tallest plants to be found anywhere in the world. Seaweeds more than 180 meters tall have been found in the ocean at the southern tip of South America. This height is greater than that of the tallest trees in the world – the giant sequoia trees of California (see, photo below) and the eucalyptus trees of Australia. The Australian threes are rather taller than the American ones. One giant eucalyptus, measured after it has fallen, was 152 meters high. A giant sequoia tree called the Father of the Forest was 121 meters high at the time of its fall.