I don't recall ever going to long gully,
it may be, part of waterfall gully, if so
a very popular holiday destination near Adelaide.
Gold in South Australia
South Australia's earliest goldrush was sparked by William Chapman when he discovered gold near Echunga in 1852. Prospectors then moved west over Chapel Hill and into Long Gully. In 1868 the news of a rich strike at Jupiter Creek just to the south of this area attracted over 1,000 people in the first few weeks. A mining township with two stores, a hotel, a wineshop and huts was established on the hill above Long Gully.