The Kennecott Mine Camp was a booming Alaskan copper mining town in the first couple of decades of the 20th century. The richest vein of copper ever is estimated to have produced $100 million in profits! But by 1939 the copper was gone and the several mines were abandoned. However, the Kennecott is in a national park and has been designated a National Historic Landmark. That's why the buildings there survived much better than the surrounding mines, and you can visit them -if not in person, then through a history and set of photographs at Kuriositas. Link -via the Presurfer
(Image credit: Flickr user urban archaeology)