Question: What continent is the Balls Head Reserve and Sydney Harbour Bridge located?

full_context: Document 1: North Head, New Zealand: Maungauika is a volcano forming a headland called North Head at the east end of the Waitemata Harbour in Auckland, New Zealand in the suburb of Devonport. Known for its sweeping views over the harbour and the Hauraki Gulf, since 1885 the head was mainly used by the military as a coastal defence installation, which left a network of accessible old bunkers and tunnels as its legacy, forming part of the attraction. The site was protected as part of Hauraki Gulf Maritime Park in 1972 and listed as a Category I historic place in 2001. As part of a 2014 Treaty of Waitangi claim settlement the volcanic cone was officially named Maungauika and the reserve renamed Maungauika / North Head Historic Reserve. Maungauika is the Māori word for" Mountain of Uika".
Document 2: Sydney Harbour Bridge: The Sydney Harbour Bridge is a steel through arch bridge across Sydney Harbour that carries rail, vehicular, bicycle, and pedestrian traffic between the Sydney central business district (CBD) and the North Shore. The dramatic view of the bridge, the harbour, and the nearby Sydney Opera House is an iconic image of Sydney, and Australia. The bridge is nicknamed "The Coathanger" because of its arch-based design.
Document 3: Port Jackson: Port Jackson, consisting of the waters of Sydney Harbour, Middle Harbour, North Harbour and the Lane Cove and Parramatta Rivers, is the ria or natural harbour of Sydney, New South Wales, Australia. The harbour is an inlet of the Tasman Sea (part of the South Pacific Ocean). It is the location of the Sydney Opera House and Sydney Harbour Bridge. The location of the first European settlement in Australia, Port Jackson has continued to play a key role in the history and development of Sydney.
Document 4: West Gate Bridge: The West Gate Bridge is a steel box girder cable-stayed bridge in Melbourne, Victoria, Australia. It spans the Yarra River, just north of its mouth into Port Phillip, and is a vital link between the inner city (CBD) and Melbourne's western suburbs; with the industrial suburbs in the west and with the city of Geelong, 80 kilometres (50 mi) to the south-west. It is one of the busiest road corridors in Australia.
Document 5: Ku-ring-gai Chase National Park: The Ku-ring-gai Chase National Park is a protected national park that is located in New South Wales, Australia. The 14977 ha national park is situated 25 km north of Sydney located largely within the Ku-ring-gai, Hornsby, Warringah and Pittwater local government areas. The villages of Cottage Point, Appletree Bay, and Bobbin Head are located within park boundaries. An isolated portion of the park; Barrenjoey Headland, is located to the north of Palm Beach east of the primary park body and is home to Barrenjoey Lighthouse.
Document 6: Balls Head Reserve: Balls Head Reserve is a forested headland situated on Port Jackson, 1.5 kilometres (one mile) west of the Sydney Harbour Bridge. It is named after Lieutenant Henry Lidgbird Ball, a Royal Naval officer who commanded the Supply on the First Fleet. The original inhabitants were the Cammeraygal people. Evidence of their occupation includes art sites, middens and a spectacular petroglyph of a marine creature. An Aboriginal burial site within a rock shelter was documented by Sandra Bowdler, an archaeologist from the Australian Museum in 1964.
Document 7: Sydney Harbour Tunnel: The Sydney Harbour Tunnel is a twin-tube road tunnel in Sydney, Australia. The tunnel was completed and opened to traffic in August 1992 to provide a second vehicular crossing of Sydney Harbour to alleviate congestion on the Sydney Harbour Bridge. It is the only tunnel under the harbour, although there are plans to build a set of rail tunnels.
Document 8: Seal Rocks, New South Wales: Seal Rocks is a small coastal settlement in the Mid-Coast Council local government area, in the Mid North Coast/Hunter regions of New South Wales, Australia, 275 km north-north-east of Sydney. It is famous for its many premier surfing beaches (including Lighthouse Beach, Treachery and Yagon), and also for being the home of Seal Rocks lighthouse, officially known as Sugarloaf Point Lighthouse. At the 2006 census, the area had a population of 131 persons.
Document 9: Bungaroo: Bungaroo is a locality near St. Ives, Sydney, Australia. The location is thought to be the site where Governor Arthur Phillip and party camped on the night of 16 April 1788 on the first of many expeditions intended to find arable land that could supply the Colony with agricultural products. The colony at Sydney Cove was dependent on supplies from England, but the soils around the harbour were too poor to support crops and sustain the Colony. This trip is very historic for the Ku-ring-gai Shire, being when Europeans first entered there. It is very historic for the entire Colony or State, being when the Blue Mountains were first sighted. It is believed from later statements made by Governor Phillip that he realized on seeing such large mountains that they must have a large river with rich alluvial soils. Thus the day after camping at Bungaroo the Colony's ultimate survival was realized, and it would be very soon indeed that the Governor would direct endeavour westwards with major consequences. As all that unfolded, unto this day, some consider that Bungaroo is the sole place recognizable in the colonists' writings of 1788 which now remains unchanged from as it was then.
Document 10: Hornby Lighthouse: Hornby Lighthouse, also known as South Head Lower Light or South Head Signal Station, is an active lighthouse located on the tip of South Head, New South Wales, Australia, a headland to the north of the suburb Watsons Bay. It marks the southern entrance to Port Jackson and Sydney Harbour, as well as lighting the South Reef, a ledge of submerged rocks. It is the third oldest lighthouse in New South Wales. Designed by Mortimer Lewis and listed on the (now defunct) Register of the National Estate and on the New South Wales State Heritage Register since 2 April 1999, with the following statement of significance:
Document 11: Sydney Harbour Bridge cycleway: The Sydney Harbour Bridge cycleway is a 2 km conjoined cycleway from the north and south that crosses the Sydney Harbour Bridge on its western side, linking the Sydney central business district with North Sydney, Sydney's Northern Suburbs and the North Shore, in Sydney, New South Wales, Australia.
Document 12: Bayonne Bridge: The Bayonne Bridge is an arch bridge spanning the Kill Van Kull connecting Bayonne, New Jersey with Staten Island, New York City. It carries NY 440 and NJ 440. The Bayonne Bridge is the fifth-longest steel arch bridge in the world, and was the longest in the world at the time of its completion. The bridge is also one of four connecting New Jersey with Staten Island; the other two roadway bridges are the Goethals Bridge in Elizabeth and Outerbridge Crossing in Perth Amboy, and the rail-only Arthur Kill Vertical Lift Bridge, all of which traverse the Arthur Kill.
Document 13: Balls Head Bay: Balls Head Bay is a bay located to the west of the Waverton Peninsula and west of Balls Head and to the east of Berry Island, on the north of Sydney Harbour.
Document 14: Hoddle Bridge: The Hoddle Bridge is an arch bridge over the Yarra River between Richmond and South Yarra, Melbourne, Australia. It carries Punt Road across the Yarra. It is a four-lane road bridge with narrow footpaths on either side. It is of continuous reinforced concrete T-beam construction with five segmental arched spans, supported on transverse piers, and linked by concrete cross-beams.
Document 15: Brooklyn Bridge: The Brooklyn Bridge is a hybrid cable-stayed/suspension bridge in New York City and is one of the oldest bridges in the United States. Started in 1869 and completed fourteen (14) years later in 1883, it connects the boroughs of Manhattan and Brooklyn by spanning the East River. It has a main span of 1595.5 ft and was the first steel-wire suspension bridge constructed. It was originally called the New York and Brooklyn Bridge and the East River Bridge, but it was later dubbed the Brooklyn Bridge, a name coming from an earlier January 25, 1867, letter to the editor of the "Brooklyn Daily Eagle" and formally so named by the city government in 1915. Since opening, it has become an icon of New York City and was designated a National Historic Landmark in 1964 and a National Historic Civil Engineering Landmark in 1972.
ground_truth: Australia