Discovered by Madeleine

Bushwalking the Box Vale Track

Hike in Woodlands, NSW
I don't know how many wrong turns I must have taken to turn this apparently 4.5km walk into a 9km one, but I recommend this hike all the same. You walk through butterfly-filled scrub paths, rock cutaways, and fern-edged tracks, and end up at a 100-metre tunnel that runs through the rock face which a train once upon a time ran through.