Indonesia

Indonesia's dry season runs April through October, but that framing hides more than it reveals. The monsoon arrives weeks earlier in Java than in Lombok. Semeru is at Alert Level IV regardless of season. Agung closes for Hindu ceremonies with no fixed calendar. And eruption frequency is accelerating — 192 eruptions in the first quarter of the 21st century versus 626 in the entire 20th. The month you choose depends on which island, which volcano, and whether that volcano is currently exploding.

130 active volcanoes. The only Seven Summit that requires rock climbing. Crater lakes, sulfur mines, Hindu ceremonies inside active calderas, and equatorial glaciers that will vanish by 2030. Indonesia is not the next Nepal — it's a fundamentally different kind of mountain.