The road from Te Anau to Milford Sound has quite a few more attractions worth visiting. The first starting from Milford is:
The chasm is only a short walk away from the street, but this short walks let you fathom the density of Fiordland forests and their beauty.
Also a bridge leads over a 22 m deep ravine where the Cleddau River has cut through solid rock, carving out fascinating formations. But see for yourself: