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The Carlton Centre is a 50 story skyscraper and shopping centre situated in downtown Johannesburg, South Africa. In 223 metres (732 feet ), it is the second tallest building in Africa following The Leonardo and the tallest office building. The foundations of both buildings in the complex are 5 m (16 feet ) in diameter and extend 15 m (49 feet ) down to the bedrock, 35 m (115 feet ) below street level. The building houses both offices and shops, and has over 46 percent of the floor area below ground level. The Carlton Centre is linked to the Carlton Hotel by a below-ground shopping centre with over 180 shops.

Source: Wikipedia

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Kennecott Utah Copper LLC's Garfield Smelter Stack is a 1,215 Ft (370 m) high smokestack west of Magna, Utah, along with Interstate 80 near the Great Salt Lake.

It was constructed to disperse exhaust gases from the Kennecott Utah Copper smelter at Garfield, Utah.

Source: Wikipedia