Arriving on a flight from Dunedin we will have a 7hr 35 minute layover in Auckland International ( from 11:40 AM to 7:15 PM) as we wait for our international flight home. We will have spent time in Auckland at the beginning of our trip, expecting to have visited the Auckland Museum and One Tree Hill. With that amount of time is it worth it to return to the city to do something else? Or will traffic, the rush hour return to the airport etc make it too chancy to leave the premises? Are we even permitted to check in our luggage that early and leave the airport? Is there anything closer to the airport of interest? We enjoy anything historic or cultural. A great birding spot or some wineries would also fit the bill. Thank you for your help.