Start your day at Colva Beach, one of the most popular beaches in South Goa. Take a dip in the Arabian Sea or just soak up the sun on the white sand beach. You can also try some water sports like parasailing and jet skiing.
Visit the UNESCO World Heritage Site, the Basilica of Bom Jesus, which is famous for the mortal remains of St. Francis Xavier. The church is a fine example of Baroque architecture and houses many paintings and artifacts from the Portuguese era.
Grab lunch at Martin's Corner, a popular restaurant that serves authentic Goan cuisine. Try their famous Goan fish curry, prawn vindaloo, and bebinca, a traditional Goan dessert.
Explore the natural beauty of Goa at the Dudhsagar Waterfall, one of the tallest waterfalls in India. The waterfall is surrounded by lush greenery and is a popular spot for hiking and trekking.
End your day at Cabo de Rama Fort, a historic fort that dates back to the Portuguese era. The fort offers stunning views of the Arabian Sea and is a great spot for watching the sunset.
If you have more time, consider visiting the spice plantations in Ponda, the Shri Mangueshi Temple in Priol, or the Salim Ali Bird Sanctuary in Chorao. You can also take a side trip to the nearby state of Karnataka to visit the famous Gokarna Beach or the historic city of Hampi. To maximize your fun, try to plan your itinerary around the various festivals and events that take place in Goa throughout the year, such as the Goa Carnival or the International Film Festival of India. Lastly, don't forget to sample the local cuisine and try some feni, a traditional Goan liquor made from cashew or coconut.