//
Photo: 221.20 (talk), Public domain via Wikimedia Commons
A museum devoted to pack ice, a common phenomenon in the Okhotsk Sea but for some reason a subject of fascination among the Japanese. Here you will learn all you ever wanted to know and more about pack ice, and even get a chance to touch some in a room kept at -15 °C (5 °F) (coats provided).
© OpenStreetMap contributors
北方民族博物館 Hoppō minzoku hakubutsukan
A modern and moderately interesting museum documenting the lives of northern peoples around the world, not just Japan's own Ainu, but Canadian Inuit, Scandinavian Saami and many more. Most of the material is also in English and there are some fairly bizarre exhibits involving, among other things, seal intestines.
網走監獄 Abashiri Kangoku
The original buildings of the infamous prison, but moved halfway up Mt. Tento to free up some real estate. Inside are wax dolls of prisoners and a hair-raising array of shackles and other prison paraphernalia.