Opening hours of Nature preserve in Dismal Swamp, South Australia Opening hours of Nature preserve in Dismal Swamp, South Australia Home / South Australia / Dismal Swamp / Nature preserve Tourist attraction Telford Scrub Conservation Park. Dismal Swamp SA 5291, Dismal Swamp, South Australia 5291 (08) 8735 1177 Categories of local businesses in Dismal Swamp Automotive Nature preserve Tourist attraction Travel & Accommodation