This is the "Faithful Couple" in the Mariposa Grove, part of Yosemite National Park in California. These two Giant Sequoia trees have grown so close together that their trunks have actually merged. The Grove was discovered in 1857 by Galen Clark, and is the largest area of Giant Sequoia trees in the Park. Two of the Park's trees are among the largest 25 in the world. They are spectacular.