Auckland is a city with a lot to offer, even if you only have one day to explore. Here are some top things to do in Auckland for a day:

1. Go Island Hopping: Take a ferry to one of the nearby islands, such as Waiheke Island or Rangitoto Island, to enjoy beautiful vineyards, wineries, beaches, and hiking trails.

2. Visit the Sky Tower: This iconic tower offers stunning views of the city and surrounding area. You can even bungy jump or walk around the edge of the tower for an extra thrill.

3. Explore the Auckland War Memorial Museum: This museum offers a fascinating look at New Zealands history and culture, including exhibits on the Maori people and their traditions.

4. Visit the Auckland Art Gallery Toi o Tāmaki: This gallery features both modern and traditional exhibitions, showcasing the best of New Zealands art scene.

5. Take a stroll around Auckland Domain: This large park is the oldest and largest in Auckland, featuring a volcano, a museum, a botanical garden, and several monuments. You could easily spend a few hours exploring it all.

6. Shop and dine in the city: Auckland offers world-class shopping and dining experiences, with plenty of options to choose from.

If you have more than one day in Auckland, consider taking a day trip outside of the city to places like Rotorua or Hobbiton. And dont forget to plan ahead for tours and accommodations, especially during peak travel season.