Architecture of Melbourne has given Melbourne a reputation as a city of no characterising architectural style, but rather an accumulation of buildings dating from the present back until the European settlement of Australia. The city is also home to Eureka Tower (2006), which was the tallest residential tower when measured to its highest floor for some time. Melbourne was first settled in 1835, after the discovery of fresh water in the Yarra River. The land to the north of the Yarra was considerably flat, while low-lying mountain ranges lay to the west, east and north, with small streams running through the plains of
Melbourne Zoo Zoological Board of Victoria administers the Melbourne Zoo, as well as the Werribee Open Range Zoo which features herbivorous creatures in an open range setting; and Healesville Sanctuary on of bushland exhibiting Australian fauna. On 15 January 2010 Melbourne Zoo welcomed its first elephant calf. This is the second elephant calf born in Australia, the first being in Sydney in July 2009. Melbourne Zoo new seal enclosure has been completed and was opened in December 2009. Melbourne Zoo commemorated 150 years of operation in 2012 and this was celebrated in an Australian Zoos collector's edition of stamps released by Australia