Beneath us was a railway line and in front of us, Circular Quay, the tourist hub of Sydney, from where quaint green and gold ferries plough their way across the harbour.

BBC: Subterranean Sydney

The sprawling lake, estimated at being two thirds the area of Sydney Harbour, is framed by the Danbulla Forest, a green blanket of rainforest, pine and scrub that offers refuge to kangaroos, bird colonies and platypus.

BBC: Escaping the heat in Far North Queensland

The festival celebrates Bristol's heritage, the city centre harbour and waterfront areas as well as its artistic community and green credentials.

BBC: Bristol Harbour Festival organiser announced