O Loan Lagoon is a picturesque freshwater lagoon located in Phu Yen. It is surrounded by lush greenery and offers a peaceful environment for your family to relax and enjoy nature. Take a boat ride on the lagoon and admire the scenic beauty. You can also try fishing or crab catching, which will be a fun activity for the whole family. Don't forget to bring a picnic basket and have a delightful meal by the lagoon.