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Carved by the Gokase River, one of the main highlights is the 17-m Minai Waterfall, best viewed by the sightseeing railway above or renting a boat (¥5,000/30 min for up to 3 people) and going for a paddle, since the current is gentle and easy to navigate. But there is also a 300-m hiking path beside the river, which passes several striking rock formations, and terminates at a small rest area, parking lot, and bridge across the rapids in the narrowest part of the Gokase River.
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天岩戸神社
The cave where Amaterasu hid and the shrine protecting it. This being a Shinto site, the cave is much too holy to let mere mortals inside, but there's an observation deck across the river and pilgrims have stacked countless stones on the paths around the shrine.