Take a boat tour to explore the nearby islands of Nha Trang on your fourth day. Visit Mun Island, known for its vibrant coral reefs and diverse marine life, and go snorkeling or scuba diving to witness the underwater wonders. Continue to Tam Island, where you can relax on the pristine beaches or try out water activities like parasailing or kayaking. End the day with a seafood dinner on one of the islands before returning to Nha Trang.
