In this photo taken, Saturday, May 21, 2011, a tourist walks along the boardwalk at Midway Geyser Basin inside Yellowstone National Park, Mont. As the summer travel season kicks off this Memorial Day ... more 
In this photo taken, Saturday, May 21, 2011, a tourist walks along the boardwalk at Midway Geyser Basin inside Yellowstone National Park, Mont. As the summer travel season kicks off this Memorial Day weekend, many people may take one look at the price of an airplane ticket or a gallon of gas and decide to put off their dream vacation for one closer to home and closer to nature. less 
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Associated Press | Photo By Julie Jacobson
Sat, May 28, 2011 8:15 AM EDT