Clinching the top spot with just over 3.6 million posts, the Grand Canyon National park in Arizona is home to one of the most popular landmarks in the US. Certainly, grand in its size, its iconic namesake canyon forms an 18-mile-wide (29km) gorge where the Colorado River has sliced its way through the landscape.

Its familiar rust-coloured rock dates back roughly six million years and typically attracts millions of visitors each year.

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Now read on for more of America’s stunning natural wonders

Have you visited the world's most stunning national parks?