O Loan Lagoon is a picturesque freshwater lagoon located in Phu Yen. It is a perfect spot for nature lovers and birdwatchers. Take a boat ride on the lagoon and immerse yourself in the tranquility of the surroundings. Admire the lush greenery, floating water lilies, and the diverse bird species that call this lagoon home. If you're lucky, you might spot some rare birds like the black-faced spoonbill. Enjoy a picnic by the lagoon and savor the peaceful atmosphere. Don't forget to bring your binoculars and camera to capture the beauty of this hidden gem.