These are a few self drive or coach tours you can make from Sydney. They can be a day, overnight or weekend excursion. 

NSW - New South Wales Tourism     NSW National Parks & Wildlife Service      NSW CityRail     NSW Sydney Buses    NSW Sydney Ferries      What's - On - In - Sydney

Coach Tours:-   AAT Kings    APT - Australian Pacific Touring   GrayLine     Great Sights     Rover Coaches   

• Australia's Museum of Flight    Nowra
• Australian Reptile Park at Somerby 
• Berrima Historic Village
• Blue Mountains  
• Bowral Town & Region
• Bradman Museum @ Bowral  
• Canberra   &   Region 
• Central Coast
• Dolphin Watch Cruises Jervis Bay
• Echo Point & Three Sisters @ Katoomba 
• Hawkesbury River Cruise
• Hunter Valley Gardens 
• Hunter Valley Wineries
• Jenolan Caves
• Katoomba & Leura etc
• Kiama Blowhole
• Ku-ring-gai Chase National Park
• Mount Annan Botanic Gardens
• Mount Tomah Botanic Gardens
• Mount Wilson Gardens
• Newcastle Waterfront & Nobby's Head
• Palm Beach and Hawkesbury River Cruises
• Palm Beach & Ferry Service
• Royal National Park
• Whale Watching
• Wollongong Region