I think the Silica Rapids walk at Tongariro was my favourite, even though the weather was a bit dull and drizzly. Native forest, alpine bogs, streams. I loved it all. Theoretically there were birds in some spots but I didn’t see them.

Native forest and broad even track.
Stream flowing over yellowed rocks.
Sign explaining the yellow comes from iron and clay.
Board walk across alpine bog.
Sign explaining that alpine bogs form in small depressions with a thick lining of clay like a saucer holding water.
Volcanic hazards sign.
Alpine stream surrounded by bush.
Silica Rapids stream flowing across yellowed rocks.