Izu Islands
Niijima: The Island of Lava Cascades
An overnight ferry from Tokyo, a mountainous island of white rhyolite and the lava cascades of Koga: a day on Niijima, in the Izu archipelago, between cliffs, beaches and volcanic rock.
Full day for the main viewpoints + sights (or 1–2 days if pairing with nearby Shikinejima)
