JSTOR3y
Map of the United States, showing routes of principal explorers and early roads and highways
A map of the United States, including color-coded routes of significant explorers and early roads used by travelers and Native Americans such as the Kittaning Path, the Great Trail, the Great Indian ...
Collapse of abandoned mine caused massive I-80 sinkhole, state says
A crumbling mineshaft caused the 40-foot-by-40-foot sinkhole that closed part of the highway, state transportation officials ...