Inlet of the South Pacific Ocean, southeastern Australia. Lying south of Sydney off Port Jackson, it is about 5 mi (8 km) at its widest. It was the scene of the first Australian landing by Capt. James Cook in 1770; he named the bay for its great variety of plants. It was selected in 1787 as the site for a penal settlement, but the settlement was soon transferred inland. Its shores are now ringed by Sydney's suburbs.
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A number of memorials, commemorating Australia's history are located at the entrance to the Kurnell Peninsula portion of the Botany Bay National Park. This area has a coast walk connecting the memorials, and is near the information centre and a museum.
The Kurnell Peninsula portion includes much of the eastern half of the promontory, adjacent to the Caltex Oil Refinery. The area is bordered by sandstone cliffs, eroded to a few metres above sea level in the north and higher in the south. The highest point is about a hundred metres above sea level and there are two mapped lookouts, Kurnell Lookout, and Houston Lookout. Hills of dry sclerophyll bushland include Botany Cone, 55 m, and Long Nose, 101 m. There are many small points and cliff formations and several walking tracks. The carpark and lookout at the end of the Yena Track is popular for whale watching in the migration season.