National park photo ops: Head for the very back to snap a photo of this Alaska train

The Alaska Railroad delivers hundreds of visitors a day in Denali National Park & Preserve. The long, domed train is best photographed from the last car while it stretches and curves along the track.

At Alaska’s Denali National Park, the peak moments come wild and high »

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National park photo ops: In case of emergency, break glass — or just take a picture

Yes, you can catch Alaska critters through a tour bus window

Grab a free Black Friday pass (before they’re gone) to one of 116 California parks

In honor of this year’s National Park Service centennial, the Travel section is posting 100 park travel ideas and tips based on trips staff travel writer Christopher Reynolds has taken, along with photo-op advice from Times photographer Mark Boster. We’ll post one per day through Dec. 31.

Follow Reynolds on Twitter: @MrCSReynolds

See travel videos by Reynolds from around the world.