Series 1 - The Round Rocks of Australia. The wonders of nature will always amaze us though what interests a viewer has shifted with time. A century ago there was great interest in natural shapes which were uncommon in the man-made world. A Glug interest is round rocks which were commonly reproduced in the era of postcards from 1900 to the 1930s. Here are six favourites going clockwise from the top LHC: Mount Bald, Southhope, Queensland, 1926; location unknown probably N.S.W. 1907; Egg Rock, Mount Buffalo, Victoria; Balancing Rock, Glen Innes, N.S.W.; Devils Marbles, N.T.; Dundas Rock, Norseman, W.A.