From Tweed Heads to Ballina there are a string of Second Hand and Antique stores full of amazing and unusual treasures. These shops are collectively known as Northern Rivers Second Hand Trail, passing through some classic historic towns, past stunning beaches and along forested mountain roads. I reckon you could cover the whole trail in a day, but it's best to take your time and really search out those hidden gems in this magical part of the world.
According to the official map and brochure (complete with individual addresses and details), the trail begins in Tweed Heads with a range of salvage and renovation stores to satisfy any renovator or collector. Next stop is Chinderah, a riverside village at the foot of the Great Dividing Range. Continue on to Murwillumbah, a larger country town with some Art Deco and Federation style buildings worth investigating.
The laid back fishing village of Brunswick Heads is next on the Trail, with several op shops and second hand emporiums, such as Clem's Cargo to visit. They host the Old and Gold Festival each June long weekend, celebrating all things old, secondhand and recycled. On with the treasure hunt to Byron Arts and Industrial Estate where you will find artists at work on reclaimed timber furniture among many other interesting studios and small scale factories.
Heading inland, Mullumbimby has a number of retro and vintage shops to keep you busy, before the trail leads you on to the idyllic country town of Bangalow, where you will discover many arts and crafts among the second hand goodies. Next, I highly recommend the strip of secondhand and vintage stores at North Lismore as well as the many museums, galleries and a ton of book shops in the main part of town. Travel through Alstonville before winding up at the coastal town of Ballina, the home of one of Australia's largest antique and collectibles stores, Summerland Antiques and Collectibles. If you haven't found what you're looking for by this point in the trail, I'd be most surprised. Good luck and happy treasure hunting.