After sunrise, make your way down to the Sea of Sand, a surreal expanse of black volcanic ash that stretches like a lunar landscape.
Visitors can cross it by jeep, horse, or on foot before reaching the staircase that leads to Mount Bromo's smoking crater. The climb is steep but rewarding, and peering into the heart of an active volcano is as humbling as it is exhilarating. Don't forget a scarf or mask, as Bromo doesn't hold back on the sulfur.