Teshikaga, Hokkaido

Sulfur hangs faintly in the air near Atoasanupuri, where the ground vents steam through more fissures than you can count from the path's edge. The volcano sits above Kawayuonsen, its acid-clear water feeding the baths below — a hard, mineral heat that smells of deep earth. This is Teshikaga, a town shaped more by caldera geology than by anything human hands have built, and the landscape makes that clear from the first hour.

Kusharo Lake spreads wide and quiet, its shoreline broken by small hot springs that seep directly into the sand. The Kusharo Kotan Ainu Minzoku Shiryokan stands nearby, holding hundreds of objects that document the lives of the people who named this land — Kamui Nupuri, Atoasanupuri — before the dairy farmers arrived and the 900 Grassland was fenced into pasture. In Kawayuonsen, the Taiho Sumo Kinenkan holds records of the 48th Yokozuna, who was born here; it is an unexpected detail, a room full of trophies and photographs inside a spa town that otherwise runs on sulfur and silence.

Mashu Melon appears at roadside stands, and the potato fields stretch between patches of forest. In winter, the phenomenon known as Diamond Dust in Kawayu draws people out into the cold air before dawn. The釧路 River begins its long journey south from these caldera waters, and roughly seventy percent of the municipality is forested — a figure you feel rather than calculate, driving between sparse settlements under a sky that always seems wider than expected.