O Loan Lagoon is a picturesque lagoon located in Phu Yen. It is known for its tranquil atmosphere and stunning natural beauty. Take a boat ride on the lagoon and admire the surrounding mangrove forests and diverse bird species. If you're lucky, you might even spot some local fishermen catching fresh seafood. O Loan Lagoon is also a great place for photography enthusiasts, with its serene landscapes and vibrant sunsets. Don't forget to try some of the delicious seafood dishes at the nearby floating restaurants for a complete experience.