The nearest good tourism information point near the Mall in the CBD is in Regent Arcade. They have tourist information there relating to maps of Adelaide and the following:
Wine Tasting & Sightseeing Tours around Adelaide (Bums on Seats Tours - Budget tours)
Best Adelaide Wine Tasting Tours & Sightseeing (BOS Tours - Group and private tours)
Hills Luxury Day Tours | Wine Tours in Adelaide Hills, AU (Hills Luxury Tours)
Walking Tours with Neil: Adelaide Tours
Click for a facebook group called Visiting Adelaide for Tourists which is a community designed for travellers heading to Adelaide or are in Adelaide, where you can ask questions and share tips.