Mount Colah topographic map
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Mount Colah
Mount Colah is 5 km north of Hornsby, the nearest major town centre. It is one of the most northerly suburbs of Sydney and is where the "Welcome to Sydney" sign is located. Mount Colah is the second highest suburb in Sydney by elevation. Considered one of Sydney's leafier suburbs, streets are clustered around the Pacific Highway. Mount Colah is bordered to the east by the Ku-ring-gai Chase National Park.
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Prospect Hill
Australia > New South Wales > Sydney
As at 19 February 2001, the Prospect Hill area had state significance due to its unique combination of significant landscape feature, potential archaeological site, and association with important historical phases. As a dolerite outcrop rising to a height of 117 metres (384 ft) AHD , Prospect Hill is a rare…
Average elevation: 65 m

Sydney Observatory
Australia > New South Wales > Sydney
The place has an association with an extensive array of historical figures most of whom have helped shape its fabric. These include: colonial Governors Hunter, Bligh, Macquarie & Denison; military officers and engineers Macarthur; Barrallier; Bellasis and Minchin; convicts: the as yet unnamed constructors of…
Average elevation: 14 m