Muan is proud of its mudflat octopus, and Nakji Alley in Muan-eup is the easiest place to eat it. Expect simple restaurants, seafood smells, and preparations that treat octopus as everyday local food rather than a novelty.
The area is liveliest around the Muan Mudflat Octopus Festival, but it is worth a stop any time you are passing through town hungry.