Despite being one of the most famous and most-visited attractions in the United States, Grand Canyon National Park still holds some surprises. Here are a few facts about the Grand Canyon you probably don’t know.

Next

1. We’re missing 950 million years’ worth of rocks

The Grand Canyon offers one of the most visible examples of a worldwide geological phenomenon known as the Great Unconformity, in which 250 million-year-old rock strata lie back-to-back with 1.2 billion-year-old rocks. What happened during the hundreds of millions of years between remains largely a mystery.

The Grand Canyon

You might think you know all the facts about the Grand Canyon, but this Arizona landmark is still full of surprises. Pay a visit to Grand Canyon National Park to learn about the canyon’s unique history, and get a firsthand look at its indescribable natural beauty.

The Grand Canyon
The Grand Canyon
The Grand Canyon
Next