The Sydney, or Centrepoint Tower is Sydney's tallest free-standing structure, and the second highest in Australia after the Q1 building on the Gold Coast. It is the third tallest observation tower in the Southern Hemisphere.

It stands 305 m (1,001 ft) above the Sydney CBD, and is accessible from the Pitt Street Mall, above Centrepoint, an office and shopping centre development between Pitt and Castlereagh Streets.
The tower is open to the public, and is one of the most prominent tourist attractions in the city.

Building construction began in 1970, and tower construction in 1975. Public access was made available from September 1981. The total cost of construction was AUD$36 million.

Three sections of the tower are open to the public. The observation deck has an enclosed viewing platform featuring 360 degree views of the city and surrounds and a small gift shop. The Sydney Tower Skywalk platform at 268 m (879 ft) has an open air viewing platform only accessible as part of planned and booked tours.
There are also revolving restaurants, one à la carte and one buffet.

Travel from the ground to the tower is via three high speed double-deck elevators that reach the observation deck in approximately 40 seconds at maximum speed depending on wind conditions.

The annual Sydney Tower Run-up is a gruelling race up 1,504 stairs from Pitt St Mall to the Observation Deck. The event raises money for the Cancer Council, and the male and female winners become eligible to compete in the Empire State Building Run-up.