Carlton Centre vs Q1 Tower

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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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Q1 Tower (an abbreviation of Queensland Number One) is a 322.5-metre (1,058 feet ) skyscraper in Surfers Paradise, Queensland, Australia. The residential tower on the Gold Coast has been the world's tallest residential building from 2005 to 2011. As of 2020 it is the ninth-tallest residential tower in the world and is the tallest building in Australia and the Southern Hemisphere, and the second-tallest freestanding construction in the Southern Hemisphere, behind the Sky Tower in Auckland, New Zealand. The Q1 formally opened in November 2005. The landmark building was recognised as one of Queensland's icons during the state's 150th-birthday celebrations.

Source: Wikipedia