The Oregon Air and Space Museum, located on the grounds of the Eugene Airport in Eugene, Oregon, holds a collection of historic aircraft and spacecraft.
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The largest covered skate park in the country.
Skinner Butte is just north of downtown, and offers hiking paths that lead to the summit (though you can also drive to the top in a car) where a tree-free view of the city and surrounding mountains can be seen. The area of the park between the butte and the Willamette River has more traditional park amenities like a playground and meeting space. If the weather is nice, people will often climb the exposed basalt cliffs on the west side of the butte (with the proper training and gear, of course!) The butte was the original site of city founder Eugene Skinner's cabin and the park is named in his honor.