Otherwise nicknamed the coat hanger this bridge was built in 1815. Francis Greenway proposed building a bridge from the northern to the southern shore of the harbour. In 1990, design submissions were sent in but all the submissions were considered unsuitable. Fast forward to WWI and officials started to take the project to hand. An architect was found and Sydney Harbour Bridge construction started in 1924. It took 1,400 men eight years to build at a cost of 4.2 million pounds, or 6.61 million dollars. Six million hand driven rivets and 53,000 tonnes of steel were used in its construction. Fast forward to today and it is now one of the worlds most recognizable bridges, especially during the Sydney Harbor new year celebrations.