Western justice -- the kind delivered with a short rope and a long drop -- will be a frequent topic for discussion this month at Fort Smith National Historic Site, which preserves the site where more than a few hangings were carried out in the late 1800s.

If you wanted to immerse yourself in nature, away from the frantic pace and sights and sounds of the manmade world, you might think the wilderness of Denali National Park would be the ideal place. And you would be wrong.

If you'd like to visit some parks this summer but don't relish the thought of airport security hassles or long hours in the car, perhaps train travel is the answer. Here's a sampling of options for trips to parks around the country via Amtrak.