The Homer Tunnel pierces through the Homer Saddle on the road that links Milford Sound to Te Anau and Queenstown. The tunnel is 1270m long and was once the longest gravel-surfaced tunnel in the world. Built from 1935 to 1954 and started with five men using picks and wheelbarrows its a very impressive achievement and the narrowness, darkness and 1:10 gradient make for an interesting part of the wonderful road down to Milford Sounds.
On your way back from the awe-inspiring Milford Sounds, stop off right after you exit the Homer Tunnel for a cracking Alpine Trail. Keep an eye out as this is a great place to see Alpine Parrots as well as the beautiful flora and fauna.