SAN FRANCISCO (CBS/AP) — The fee for an adult to enter Northern California’s popular Muir Woods will increase from $7 to $10 in 2016.

Entry for children under 16 years of age will continue to be free, said the National Park Service, which announced the price increase on Thursday.

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It’s free for visitors to mill around the parking lot and entrance plaza, but they must pay for interactive-friendly, close-up views of the coast redwood forest named after conservationist John Muir. The park attracts about 1 million people a year. President Theodore Roosevelt declared the area a national monument in 1908.

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A $20 annual fee for Muir Woods will increase to $40, also starting Jan. 1.

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