The tallest trees in the world, coast redwoods, grow within a narrow sliver of land on the California coast, from just south of the Bay Area up to the border with Oregon.
Redwoods can grow up to 22 feet in diameter. The cinnamon-colored bark that gives the trees their name is usually 12 inches thick, and protects redwoods from insects, birds and fungus. Their bark, which contains plenty of water-based sap, also protects the trees from forest fires. Although redwoods have no natural predators, they have a shallow root system that digs roughly 10 to 13 feet into the ground before spreading 60 to 80 feet outward. Those roots would normally put such tall trees in danger of being ripped free and toppled by high winds. However, each tree intertwines is roots with those of nearby trees, adding strength and stability to the group or grove.