A 14-day adventure on New Zealand's North Island sounds fantastic, especially with a focus on the charming art deco architecture of Napier. Let’s dive into a fun and engaging itinerary that balances exploration, relaxation, and a bit of culture!

Day 1: Arrival in Auckland

• Morning: Arrive in Auckland. Check into your hotel and freshen up.
• Afternoon: Explore the vibrant Viaduct Harbour and grab lunch at one of the waterfront restaurants.
• Evening: Take a stroll up to the Sky Tower for panoramic views of the city at sunset. Dinner at a local eatery.

Day 2: Auckland to Rotorua

• Morning: Drive to Rotorua (about 3 hours). Stop at Hobbiton in Matamata on the way for a magical tour of the movie set.
• Afternoon: Arrive in Rotorua. Visit Te Puia to see geysers and learn about Māori culture.
• Evening: Relax in the Polynesian Spa, soaking in the thermal pools. Dinner at a local restaurant.

Day 3: Rotorua Adventures

• Morning: Visit the Rotorua Museum and Government Gardens to appreciate the architecture and history.
• Afternoon: Explore the Redwoods Forest with a walk or bike ride through the stunning trees.
• Evening: Enjoy a traditional Māori hangi dinner and cultural performance.

Day 4: Rotorua to Napier

• Morning: Depart for Napier (about 2 hours). Check into your accommodation.
• Afternoon: Start your art deco journey with a guided walking tour of Napier to admire the stunning architecture.
• Evening: Dinner at a local café, perhaps trying some fresh seafood.

Day 5: Napier Art Deco Exploration

• Morning: Visit the Art Deco Trust and the Napier Museum to learn more about the city’s history.
• Afternoon: Explore the local wineries in the Hawke's Bay region. Consider a wine tour to sample some of the best local wines.
• Evening: Enjoy dinner at a winery restaurant, soaking in the beautiful vineyard views.

Day 6: Napier to Hastings

• Morning: Take a short drive to Hastings (about 20 minutes). Visit the Hastings Art Gallery.
• Afternoon: Explore the local farmers' market (if it’s a Sunday) or enjoy a leisurely lunch in the town square.
• Evening: Return to Napier for a relaxed evening. Perhaps catch a movie at the historic Art Deco cinema.

Day 7: Napier to Taupo

• Morning: Depart for Taupo (about 2 hours). Stop at Huka Falls on the way for some stunning views.
• Afternoon: Arrive in Taupo and visit the Taupo Museum to learn about the region’s history.
• Evening: Enjoy dinner by the lake, watching the sunset over Lake Taupo.

Day 8: Taupo Adventures

• Morning: Take a scenic cruise on Lake Taupo to see the Maori rock carvings.
• Afternoon: Go for a hike in Tongariro National Park, perhaps the Tongariro Alpine Crossing if you’re feeling adventurous!
• Evening: Relax at your accommodation or enjoy a casual dinner in town.

Day 9: Taupo to Waitomo

• Morning: Drive to Waitomo (about 2 hours). Check into your accommodation.
• Afternoon: Explore the famous Waitomo Glowworm Caves. Don’t miss the boat ride through the glowing cave!
• Evening: Dinner at a local restaurant, perhaps trying some traditional Kiwi dishes.

Day 10: Waitomo to Auckland

• Morning: Depart for Auckland (about 2.5 hours).
• Afternoon: Visit the Auckland Art Gallery to appreciate contemporary and historical art.
• Evening: Explore the bustling Queen Street for shopping and dinner.

Day 11: Auckland to Coromandel Peninsula

• Morning: Drive to the Coromandel Peninsula (about 2 hours).
• Afternoon: Visit Hot Water Beach and dig your own hot pool in the sand!
• Evening: Enjoy a beachside dinner and relax to the sound of the waves.

Day 12: Coromandel Exploration

• Morning: Hike to Cathedral Cove for stunning views and a beautiful beach.
• Afternoon: Explore the local shops and galleries in Whitianga.
• Evening: Return to your accommodation for a cozy night in.

Day 13: Coromandel to Auckland

• Morning: Head back to Auckland (about 2 hours).
• Afternoon: Visit the Auckland Domain and the Wintergardens for a peaceful stroll.
• Evening: Enjoy a farewell dinner at a rooftop restaurant with views of the city skyline.

Day 14: Departure

• Morning: Last-minute shopping or a visit to any spots you may have missed.
• Afternoon: Depart from Auckland, taking with you wonderful memories of your North Island adventure!

This itinerary gives you a great mix of art deco architecture, natural beauty, and cultural experiences. Enjoy your trip, and don’t forget to take lots of photos! If you have any specific interests or adjustments, feel free to let me know!