Sydney ( /sɪdni/) is the most populous city in Australia and the state capital of New South Wales. Sydney is classified as an Alpha+ World City indicating its influence in the region and throughout the world.

Sydney is located on Australia's south-east coast of the Tasman Sea. As of June 2010, the greater metropolitan area had an approximate population of 4.6 million people. Inhabitants of Sydney are called Sydneysiders, comprising a cosmopolitan and international population.

The site of the first British colony in Australia, Sydney was established in 1788 at Sydney Cove by Arthur Phillip, commodore of the First Fleet as a penal colony. The city is built on hills surrounding Port Jackson which is commonly known as Sydney Harbour, where the iconic Sydney Opera House and the Harbour Bridge feature prominently. The hinterland of the metropolitan area is surrounded by national parks, and the coastal regions feature many bays, rivers, inlets and beaches including the famous Bondi Beach and Manly Beach. Within the city are many notable parks, including Hyde Park and the Royal Botanic Gardens.

Sydney Tower (also known as the Sydney Tower Eye, AMP Tower, Westfield Centrepoint Tower, Centrepoint Tower or just Centrepoint) is Sydney's tallest free-standing structure, and the second tallest in Australia (with the Q1 building on the Gold Coast being the tallest). It is also the second tallest observation tower in the Southern Hemisphere (after Auckland's Sky Tower, though Sydney Tower Eye's main observation deck is almost 50 m (164 ft) higher than that of Auckland's Sky Tower). The Sydney Tower is a member of the World Federation of Great Towers.

The tower stands 309 m (1,014 ft) above the Sydney CBD, located on Market Street, between Pitt and Castlereagh Streets. It is accessible from the Pitt Street Mall, and sits upon the newly refurbished Westfield Sydney (formerly centrepoint arcade). The tower is open to the public, and is one of the most prominent tourist attractions in the city, being visible from a number of vantage points throughout town and from adjoining suburbs.

Whilst the Shopping centre at the base of the tower is run by the Westfield Group the tower itself is occupied by Trippas White Group (who own and operate Sydney Tower Dining) and Merlin Entertainments (who own and operate the Sydney Tower Eye and Oztrek).