Although Panama City itself is not planned, certain areas are such as Costa del Este, an exclusive high density residential and business area, very close to downtown Panama City. The project combines many skyscrapers with beautiful green areas, and it is close to a highway that connects it to the city center. Other planned areas, but in a lesser degree, are Punta Pacifica and the former Canal Zone. Australia's most prominent fully planned city is Canberra, its capital, designed by American architect Walter Burley Griffin. The early central areas of two state capital cities – Adelaide and Melbourne – were also planned by surveyors. Walter Burley Griffin was Australia's most notable city planner, having also designed smaller cities and towns, including Leeton and Griffith in New South Wales. A controversial Japanese-backed planned city, Multifunction Polis, was proposed in the 1980s, but never implemented. Australia is still building planned communities with developers such as Delfin Lend Lease, an S&P/ASX 50 company, that has been responsible for large master planned communities such as;   Adelaide was founded by British and German colonists in 1836 to test out Edward Gibbon Wakefield's theories of systematic colonisation. Convict labour was not employed and the colony in theory would be financially self-sufficient; in practice, government assistance was used in the early stages. Land had been sold before anyone set foot in the largely unexplored territory and the city (the basis for the future central business district) was surveyed and planned in a remarkably short space of time. Adelaide's design has been praised for its four-square layout, its choice of setting and its ample parklands which have had minimal encroachment of developments. The town centre was in sufficient proximity to a water source, the River Torrens. Melbourne was planned as a free settlement in 1837 through the Hoddle Grid, drawn up by Robert Hoddle under instructions from George Gipps, the original plan for Melbourne as part of the first land sales (prior to the planning only a handful of existing settlements were built on the fringe of the grid). The grid featured wide parallel streets, spanning a gently sloping valley between hills (Batman's Hill, Flagstaff Hill and Eastern Hill) and roughly parallel to the course of the Yarra River. The deliberate exclusion of city squares or open space within the grid was a subject of future frustration for the municipality and residents Elizabeth Street, Melbourne, in the centre of the grid, was built over a gully and has therefore been prone to flooding.