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The park is huge, 1,904 square miles, bigger than Rhode Island (1,212 sq mi). Some parts of the canyon are a mile deep.
Image: Wikimedia
A tribe believes the canyon is a sacred place. They think people pass through it after death on their way to the afterlife.
Image: Wikimedia
There are about 1,000 caves in the canyon, but only 335 are known. Just one cave is open for visitors.
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The Kolb brothers took photos of tourists on mules. They sold the pictures when the riders returned from their trip.
Image: Wikimedia
The Grand Canyon isn’t the deepest. Peru’s Cotahuasi Canyon and Nepal’s Kali Gandaki Gorge are deeper.
Image: Wikimedia
The most dangerous animal in the canyon is actually the rock squirrel! Though bigger animals live there, squirrels bite visitors the most.
Image: Wikimedia
Scientists once thought the canyon formed 6 million years ago. New studies suggest it may be 70 million years old.
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The canyon is full of fossils. There are no dinosaur fossils in the canyon, but it has 1.2 billion-year-old sea creature fossils.
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There’s a town inside the canyon. Supai Village, with 208 people, is the most remote place in mainland USA.
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The Grand Canyon Pink Rattlesnake lives only here. Its pink color helps it hide in the rocks.
Image: Wikimedia