National Historic Landmark
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A National Historic Landmark is a building, district, object, site, or structure that is officially recognized by the United States government for its outstanding historical significance. Only some 2,
Independence National Historical Park in Philadelphia, one of the nation's most visited National Historic Landmark Districts
The Navajo Nation Council Chamber, the seat of government for Navajo Nation in Window Rock, Arizona, was declared a National Historic Landmark in 2004.
The Titan Missile Museum in Tucson, Arizona, a National Historic Landmark
Central Park in New York City, a prominent National Historic Landmark; New York City has 116 NHLs, more than any other city in the U.S.
Lewis and Clark Expedition
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The Lewis and Clark Expedition, also known as the Corps of Discovery Expedition, was the United States expedition to cross the newly acquired western portion of the country after the Louisiana Purchas
Portraits of Meriwether Lewis and William Clark
Camp Dubois (Camp Wood) reconstruction, where the Corps of Discovery mustered on the east side of the Mississippi River, through the winter of 1803–1804, to await the transfer of the Louisiana Purchase to the United States
Corps of Discovery meets Chinooks on the Lower Columbia in October 1805 (Lewis and Clark on the Lower Columbia, painted by Charles M. Russell, c. 1905).
Reconstruction of Fort Mandan, Lewis and Clark Memorial Park, North Dakota