A site located in the mouth of the Maruyama River, with the attractive landscapes of a large cove and fishing villages located on the ria coast in combination with the wild and beautiful rocky seashore. Tsuiyama port in the cove, where large fishing boats come and go, florishes due to the landing of Tsuiyama Crabs (snow crabs) in the winter time. You can enjoy beautiful landscapes of the Sea of Japan from the geo-guide center settled in the aquarium on the seashore.
（1）Rocky shore around Marine World
A rocky shore formed from lava and pyroclastic flow deposits due to volcanic activity during and after the formation of the Sea of Japan. A huge rock wall of rhyolite stands in the west of the seashore. Sedimentary rocks are seen in the cobble beach, where plant fossils can be found.
（2）Tsuiyama Fishing Port
Currently, many trawl-net fishing boats visit this large port, and the Tsuiyama Crab landed here has become a brand name. It used to be a port for Kitamaebune Ships.
（3）Tsuiyama Port Crab Festival
An event for cerebrating a good catch of fresh Tsuiyama Crabs, the king of winter taste, and giving thanks to the blessings of the sea and nature. Bargaining for marine products and a unique event relating to the crabs are provided.
