This past summer I visited the ruins of a shut down Manitoba gold mining operation. Most striking, of course, was the tailings pond and run off area - a stretch of forest where cyanide salt laced water/dust slurry was poured out by the megaliter for years. The photos below - regrettably taken from a camera phone - chronicle the damage. As gloomy a scene as this strange, yellow, poisoned wasteland is, it gets a level more alarming when you find out that this mine was shut down over 80 years ago: this field of chemical putrefaction has sat more or less unchanged since the mine was closed in the 1920's.
Cyanide leaching has since been replaced with less harmful and hazardous (Greenpeace: PDF) methods for gold extraction, although it is still in use globally today and continues to cause problems. Initiatives continue to encourage miners, particularly in developing economies, to mine safely and sustainably.
I believe this is the site of the mine on Google Maps; the white area is the tailings field photographed below.
One: The archetypal river of death - still flowing after 80 years. How far does the run off go?

Two: A bit of a perspective shot; the area of ruin covers many acres, as seen on Google Maps:

Three: Remains of the original works persist in the muck:

Four: Bioremediation attempts have not been successful; here a test plot of dead saplings:

Five: Industrial leavings add their own rusty flavour to the ecology:










