Hiking to the peak of Port Island offers breathtaking views of the Sea Danxia landform, characterized by vibrant reddish hues and dramatic rock formations. This unique geological site features sedimentary rocks rich in iron, formed during the Late Cretaceous period. Port Island is distinguished as the only place where you can view Sea Danxia, where vibrant red sedimentary rock formations rise dramatically from the sea. While hiking on Port Island involves a short trek, most of the time is spent taking photos and listening to the guide.