Inside THE MOST EXPENSIVE Waterfront Mansion on Sydney's Northern Beaches | Avalon Beach, NSW 

Take a look inside the most expensive waterfront mansion on the northern beaches of Sydney. Located in Avalon Beach, this $50,000,000 Home showcases the peak of luxury waterfront living in Sydney.
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This property is one of Sydney's finest, set on two lots with an immense 30-meter water frontage on Pittwater. 'Cooinda' is a true embodiment of world-class excellence, with quality beyond compare and limitless luxury.