<Tr> <Th> Structural engineer </Th> <Td> Beca Group </Td> </Tr> <Tr> <Th> Main contractor </Th> <Td> Fletcher Construction </Td> </Tr> <P> The Sky Tower is an observation and telecommunications tower located at the corner of Victoria and Federal Streets in the Auckland CBD, Auckland, New Zealand . It is 328 metres (1,076 ft) tall, as measured from ground level to the top of the mast, making it the tallest freestanding structure in the Southern Hemisphere and the 23rd tallest tower in the world . It has become an iconic landmark in Auckland's skyline due to its height and unique design . </P> <P> The tower is part of the SkyCity Auckland casino complex, originally built in 1994--1997 for Harrah's Entertainment . Several upper levels are accessible to the public, attracting an average of 1,150 visitors per day (over 415,000 per year). </P>

What is the purpose of the sky tower