A mountain in south-west Alberta, Canada, Turtle Mountain is notable only because of the way it fell. Referred to as "the mountain that moves" by the local Kutenai and Blackfoot Indians, it was also home to an enormous coal vein, which was too good not to mine. The seam was between 8 and 23 feet thick, and a stone's throw from the new Canadian Pacific Railway through Crowsnest Pass. In 1903, after only 2 years of mining, the mountain collapsed in the biggest lanslide in North America ever. It is called the Frank Slide after the town of Frank, which it destroyed.