The Largest Trees in the World. The mid-sierra zone (5,000-8,000 ft) creates ideal conditions for giant sequoia growth. Mild winter and summer temperatures, deep winter snowpack, and a rich fire history have made it possible for the world's largest tree to get its biggest in these parks. Sequoia and Kings Canyon National Parks boast many of the world's largest trees by volume. The General Sherman Tree is the largest in the world at 52,508 cubic feet (1,487 cubic meters). The General Grant Tree is the second largest at 46,608 cubic feet (1,320 cubic meters).