Treasured Tongass

With its 17 million acres of rain-soaked natural history, the Tongass National Forest can seem timeless.

• Photos

But its status as a national forest is still somewhat recent by some standards. American's largest forest reached a century of existence this year.

Created by President Teddy Roosevelt by executive order in 1907, the forest has seen seasons of conservation, clear-cutting, mining and recreation.

Here are images of this unique treasure:

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