Sure, I'd be happy to help you plan your 3-day itinerary in Kannur. Here's a suggested itinerary:

Day 1:

• Start your day with a visit to the St. Angelo Fort, which is a 16th-century Portuguese fort located on the Arabian Sea coast. You can explore the fort and enjoy the stunning views of the sea from here.
• Next, head to the Payyambalam Beach, which is one of the most popular beaches in Kannur. You can relax on the beach, take a dip in the sea, or indulge in some water sports activities like parasailing and jet skiing.
• In the evening, visit the Muzhappilangad Drive-in Beach, which is the only drive-in beach in Kerala. You can drive your car on the beach and enjoy the sunset.

Day 2:

• Start your day by visiting the Arakkal Museum, which is a museum dedicated to the Arakkal family, who were the only Muslim royal family in Kerala. You can learn about their history and see their artifacts and belongings.
• Next, head to the Kannur Lighthouse, which is a 45-meter tall lighthouse located on the cliff of the Payyambalam Beach. You can climb up the lighthouse and enjoy the panoramic views of the sea and the city.
• In the evening, visit the Parassinikadavu Snake Park, which is a snake park and research center. You can see various species of snakes and learn about their behavior and habitat.

Day 3:

• Start your day by visiting the Thalassery Fort, which is a 17th-century British fort located on the Malabar Coast. You can explore the fort and learn about its history.
• Next, head to the Dharmadam Island, which is a small uninhabited island located off the coast of Kannur. You can take a boat ride to the island and enjoy the serene surroundings.
• In the evening, visit the Kannur Beach, which is a beautiful beach located near the town center. You can relax on the beach, watch the sunset, and enjoy some local street food.

I hope this itinerary helps you plan your trip to Kannur. Have a great time exploring the city!