resources. Of the only 2,200 NHLs nationwide, 47 are located in Alaska. They are an irreplaceable legacy.NHLs evolve from theme studies or surveys of properties related to an aspect of American culture. The NHLs described in this brochure all represent a range of national themes including: exploration and settlement, military, and industrial development. The five NHLs also have one theme in common, The Alaska Gold Rush, which traces part of the history of searching for gold in the state and neighboring Canada from 1897-1904.