National Historic Landmarks
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10 Idaho National Historic Landmarks
Assay Office
(Boise) - 9/25/2023
The 1870 office symbolizes the importance of mining in the history of Idaho and the American West
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Cataldo Mission - 9/23/1989
Also known as Mission of the Sacred Heart, built in 1848 it is the oldest standing building in Idaho
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City of Rocks - 9/15/2005
Unique rock formations made from volcanic ash 30 million years ago
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Experimental Breeder Reactor #1 - 9/23/2023
This reactor was the site of several milestones, including the first usable electricity (1951), and the first self-sustaining chain reaction using plutonium rather than uranium (1963)
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Fort Hall
- 9/23/2023
A fort built in 1834 as a fur trading post was also the key post for the overland stage, mail and freight lines to the towns and camps of the mining frontier in the Pacific Northwest
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