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The buildings of Earth Tower of Hakka were constructed using fire-resistive material. The buildings are spacious and are made of different shapes like square, rectangular, semi-circular and round.

Sydney Tower is Sydney’s tallest free-standing structure, and the second tallest in Australia and is a member of the World Federation of Great Towers. It is also the third tallest observation tower in the Southern Hemisphere.

Construction of the office building commenced in 1970, and tower construction began in 1975. Public access to the tower, at the time the fourth tallest building in the world, began in September 1981. The total cost of construction was AUD $36 million.