The current 346 square miles of Petrified Forest open a window on an environment more than 200 million years old, one radically different from today's grassland. Where you now see ravens soaring ...

Continental Divide The park is more than seven million acres of wilderness that rolls out of the ice fields, mountains, alpine tundra, and boreal forest ... National Park Reserve Office in Nahanni ...

For great hiking and views near San Francisco, head to this state park with misty redwood trails, plenty of campsites and cabins, and sweeping ocean vistas.

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