Probably the only famous part of Panjin (aside from the Panjin Crab dish, apparently) is the red seaweed that grows in late summer and fall. The seaweed in the wetland reserve begins to grow in April but turns red in the fall.
Despite what you might think, it’s totally natural and happens every year. It also covers a huge area so you can take your time as you visit. You can also check out the slightly-horrifying figurines that look like monsters turned into straw. (Let’s hope they don’t come back to life…)
To be perfectly honest, while the sights are unusual and picturesque (on sunny days) I wouldn’t recommend making a special trip just for the seaweed. Transportation out of Panjin isn’t as reliable as you’d think, and it’s not guaranteed to have the big swathes of red you might hope to see.
That being said, if you’re in the area, it makes for a pretty cool sight. It certainly put me in an autumnal mood to see fiery colors, straw monsters and all.