The Grand Canyon is one of the most photographed places on Earth, so it headlines the Bing homepage regularly with a quiz attached. The facts are specific and stable, which makes this an easy landmark round to master.
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The essentials
The Grand Canyon is in Arizona, United States, carved by the Colorado River over millions of years. It became a national park in 1919, is about 446 km (277 miles) long, up to 29 km wide, and over 1.6 km (a mile) deep, figures that answer most 'how big' questions.
Carved by the river
The single most repeated question is what carved the canyon, the answer is the Colorado River, aided by erosion over an estimated five to six million years. The exposed rock layers reveal nearly two billion years of Earth's history, which is why geologists love it.
Not the deepest or biggest
A classic trap: the Grand Canyon is famous but not the world's deepest or largest canyon, others (like Tibet's Yarlung Tsangpo) are deeper. If a question asks about the 'deepest canyon', read carefully rather than assuming the Grand Canyon.
Answering approach
Arizona, Colorado River, 1919 national park, these three cover the bulk. For size or depth figures, the National Park Service pages confirm the numbers, and the caption names the viewpoint if the image shows one.
Frequently Asked Questions
What carved the Grand Canyon?
The Colorado River, aided by erosion over an estimated five to six million years, the quiz's most repeated answer.
Which US state is the Grand Canyon in?
Arizona. It became a national park in 1919 and is over a mile deep.
Is the Grand Canyon the deepest canyon in the world?
No, it's the most famous, but others such as Tibet's Yarlung Tsangpo are deeper, a common quiz trick.