line with the British experience and more in line with North America. This was encouraged by the opening of the Narrows Bridge and the gradual closure of the Perth-Fremantle Tramways. The mining-pastoral boom of the 1960s only accelerated the pace of urban growth in Perth. In 1962, Perth received global media attention when city residents lit their house lights and streetlights as American astronaut John Glenn passed overhead while orbiting the earth on Friendship 7. This led to its being nicknamed the "City of Light". The city repeated the act as Glenn passed overhead on the Space Shuttle in 1998. Perth's development and relative prosperity, especially since the mid-1960s, has resulted from its role as the main service centre for the state's resource industries, which extract gold, iron ore, nickel, alumina, diamonds, mineral sands, coal, oil, and natural gas. Whilst most mineral and petroleum production takes place elsewhere in the state, the non-base services provide most of the employment and income to the people of Perth. Geography Central business district The central business district of Perth is bounded by the Swan River to the south and east, with Kings Park on the western end and the railway reserve as the northern border. A state and federally funded project named Perth City Link sank a section of the railway line to allow easy pedestrian access between Northbridge and the CBD. The Perth Arena is an entertainment and sporting arena in the city link area that has received several architectural awards from institutions such as the Design Institute of Australia, the Australian Institute of Architects, and Colorbond. St Georges Terrace is the area's prominent street, with a large amount of office space in the CBD. Hay Street and Murray Street have most of the retail and entertainment facilities. The city's tallest building is Central Park, the twelfth tallest building in Australia. The CBD until 2012 was the centre of a mining-induced boom, with several commercial and residential projects being built, including Brookfield Place, a office building for Anglo-Australian mining company BHP. Metropolitan area Perth's metropolitan area extends along the coast to Two Rocks in the north and Singleton to the south, a distance of approximately . From the coast in the west to Mundaring in the east is a distance of approximately . The Perth metropolitan area covers . The built-up urban area of Perth is , the same as Wuhan or