text: A tourist attraction since 1907 , it was discovered in 1905 by Carl Gibbons and Edgar Hollis , two 12 year-old boys searching for a lost cricket ball .
simplified: A favorite of tourists since since 1907 , it was found in 1905 by Carl Gibbons and Edgar Hollis . The two boys were looking for their lost cricket ball which fell into a hole in the ground .