A wetland of worldwide significance, this area hosts huge flocks of migrating godwits and knots in February and March, which congregate to feed before setting off on their epic journey to the Arctic Circle.
Just in case we don't realise where we are, a giant statue of an oystercatcher on the outskirts of Kaiaua reminds us. Nearby, a couple of picnic tables looking out across the firth make a great rest spot. We devour our delicacies and a thermos of coffee, and are on our way.
A few kilometres south of Kaiaua is the Miranda Shorebird Centre, where we head out on foot to the coast. The one-hour loop walk in the wind is just the ticket. All around is the silence of deep countryside, with only the far-off barking of a farm dog and the occasional cry of a seabird overhead to break the stillness.
Back in the car, the Miranda Hot Springs beckon. With a big outdoor pool and smaller hot tubs, this is just the place to warm up on a winter's day. Afterwards, refuel at the Kaiaua fish-and-chip shop, before looping back to Auckland via either SH2 or Hunua.
If you're feeling energetic, you can take the turn off the main road to Hunua Falls for a walk past the 30m waterfall and along one of the bush tracks.
DRIVE TIME
Miranda is about 80km from the CBD - a drive of about 90 minutes.
Ciao Bella Kitchen and Store: 439 Papakura-Cleveland Rd, Clevedon, ph (09) 292 9229.
Miranda Shorebird Centre: 283 East Coast Rd, Miranda, ph (09) 232 2781. Stay for $25 a bunk or $85 for a self-contained unit. Contact: shorebird@xtra.co.nz.
Miranda Hot Springs: Main Rd, Miranda, ph (07) 867 3055.