The Riwaka Resurgence is well signposted from the main road between Motueka and the Takaka Hill. From the car park - a popular picnic area set amongst native bush - it is a 10 minute walk to the cave entrance. Gearing up at the car park rather than carrying gear is advised as the track is narrow and steep with steps in sections. When standing at the cave entrance only a small pool and narrow opening can be seen. However, the opening into the cave is much larger beneath the surface where a torch is needed almost immediately. The lead diver carries the penetration line and swims 15 metres through a straight sump which is 12 metres deep. The landscape is unique: lifeless, still, silent and cold. At the end of the sump, a short climb with your fins off across shallow rapids puts you in sump two. This sump is the same depth, but twice as long.