Blue Fire & Crater Lake

An active volcano famous for two rare sights: electric-blue flames from burning sulfuric gas (visible only in darkness, one of just a couple of places on Earth) and the world's largest turquoise acidic crater lake at dawn. You hike ~3km (steep, ~1.5–2 hrs) in the cold dark to the rim, then optionally descend into the crater for the blue fire among the sulfur miners hauling 70–90kg loads. Surreal and unforgettable, but genuinely demanding and toxic — treat the gas mask as essential.

Practical info

• Entry: Foreigners ~IDR 100,000 weekdays / 150,000 weekends. Gas mask rental ~IDR 45,000.

• Hours: Trail opens 02:00, closes noon. Closed the first Friday of every month. Can close suddenly on volcanic activity — check Magma Indonesia.

• Getting there: Paltuding base camp, ~1.5 hrs from Banyuwangi (shuttle ~150k or 4x4 jeep ~500k). 45-min ferry from Bali (Gilimanuk–Ketapang) then drive. Most do a guided overnight tour.

• Best time: Dry season (Apr–Oct), start ~02:00 for the blue fire before it fades at sunrise.

Photo tips

• Blue fire needs long exposures on a tripod — it's dimmer than photos suggest; shoot wide and bracket.

• At dawn, the bleached "Dead Forest" against the turquoise lake is the signature daytime frame.

• Headlamp-lit miner silhouettes with sulfur smoke make powerful storytelling shots — ask before shooting people up close, and keep the mask on near vents.

Ijen from Bali

Doing Ijen on its own from Bali is a classic all-nighter. Easiest option: an organized overnight tour (south-Bali pickup ~midnight) that bundles driver, the Gilimanuk–Ketapang ferry, guide and permit. Self-driving works too — Gilimanuk port is ~3–4 hrs from Canggu/Ubud, the ferry crossing ~1 hr (book via the Ferizy app), then ~1.5 hrs to Paltuding base camp for the 02:00 trail start. Note Bali runs an hour behind Java (you gain an hour heading over), and you'll need a medical certificate — quickly sorted at a Banyuwangi clinic — to enter.