Ōnuma Quasi-National Park, Quasi-national park in Hokkaido, Japan.
Ōnuma Quasi-National Park is a protected natural area in Hokkaido featuring two lakes connected by small bridges surrounded by forests at the base of Mount Komagatake. The park spans roughly 90 square kilometers and includes hiking paths that let visitors explore the lakes and surrounding woodland landscape.
The area was designated as a Quasi-National Park in 1958 and became one of the smallest protected areas of its kind in Hokkaido. The lakes and islands were formed by ancient volcanic activity that continues to define the landscape today.
The park serves as a place where visitors connect with the landscape and learn how volcanic forces shaped the land over time. Walking the paths and taking boat rides helps you experience this natural history directly.
The area sits north of Hakodate and is accessible by public transport, with bicycles available to rent on site. Boat tours run regularly during warmer months and offer a relaxed way to explore the lakes and islands.
The many small islands in the lakes were formed by ancient mudflows from volcanic eruptions and create a tangled network of waterways. This geological formation is uncommon and makes the lakes a notable example of how volcanoes shape landscapes.
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