This Montana home, located just outside of Big Sky, is built with parts taken from an old gold mine. Some of the reclaimed features include a rock-crusher fireplace, a crankshaft gateway, a tin roof and stair handrails made out of ore cart rails. Some of the home’s more modern features include a pizza oven, a wine cellar and a deck overlooking the water. The home is currently on the market at $5.9 million.