u/Bro-satara-JPN

Mt. Aso in Kumamoto is one of the largest active volcanoes in the world — and you can hike right around the crater rim.

The landscape feels completely otherworldly. Red and black layered rock, volcanic ash plains, and smoke still rising from the crater. Nothing grows, nothing looks familiar. Just raw earth doing its thing.

There are several routes to choose from, but a day hike of around 10–15km is enough to take in all of this. On a clear day you can see the entire Aso caldera spread out below you — one of the largest calderas on the planet.

Does anything like this exist where you hike?