Furnas do Enxofre is a cool spot on Terceira Island where you can witness some serious volcanic action. Picture this: hot steams shooting out of the ground in spirals, creating a mystical vibe that's even more intense in the morning when it's all quiet and eerie. Located in the middle of the island, this place is like a natural steam show that's definitely worth checking out if you're into unique sights and a bit of volcanic drama.