Ha'akulamanu (Sulphur Banks)

This is less of a hike and more of a sensory ambush. A short, flat boardwalk trail leads you past steam vents and fumaroles where the earth is actively exhaling sulfur-laced gases, painting the surrounding rocks in surreal yellows, oranges, and whites. The wooden walkway keeps you on a safe path while volcanic heat radiates from cracks just feet away — you can literally feel the warmth through your shoes in places. The air carries that unmistakable rotten-egg smell of hydrogen sulfide, which ranges from mildly unpleasant to eye-watering depending on wind direction. Crystalline sulfur deposits crust the rocks like alien frost, and the vegetation at the edges tells the story of what thrives (and what doesn't) in acidic soil. This trail is perfect for anyone who wants a visceral, zero-effort reminder that they're standing on one of the most active volcanoes on the planet.