Head to the Blue Mountains, grab a mountain bike and set off on the Oak Fire Trail, widely regarded as one of the best mountain bike tracks in Australia. The trail runs between Woodford at an altitude of 1,998-feet (609m) and winds down to Glenbrook at 535-feet (163m). Along the way you'll pass by Aboriginal rock engravings and on a clear day you’ll be able to see the Sydney skyline in the distance across the Western Plains. This self-guided 17.5-mile (28km) one-way ride is graded medium to hard, and travels over rocky, gravel, sand and clay surfaces, generally taking 1.5- to 2.5-hours to complete.