Mauna Loa Road (HVNP)

Drive carefully — the road is paved but 1-lane with passing pullouts; goats and pheasants on the road are routine. Pull off completely at marked stops to let others pass. The lookout is at sixty-six hundred feet; expect cool weather and bring a jacket. Cell reception is poor along the road; download maps before driving in. The road is rarely traveled — that's part of why it's worth the drive — but it also means help is farther away if anything goes wrong. Don't collect rocks or plants; HVNP is a national park.