Redwood trees are the tallest trees on earth, often reaching heights of more than 300 feet and measuring 10 to 20 feet in diameter. They take 400 to 500 years to reach maturity, and some redwoods currently living are over 1,500 years old, making them among the oldest living organisms on earth. As redwoods age, they lose their lower limbs, leaving a tall, columnar trunk; they are limited to the fog belt that stretches from Oregon to Northern California. The closest redwood to this playground is a lacquered and preserved cross-section in the American Museum of Natural History; Redwood Playground's name is not arboreal in origin.