Located at the Volcano National park, this trip takes about 2 hour ride from KonaLani Inn.   There is $10 entrance fee (good for one week) to enter the national park.  You proceed to the visitor center and turn back the way you came and take the road closest to the toll booth.  Proceed past the Thurston Lava tube to Crater Drive and down the hill (20 miles) to the end of the road.   Park and walk out to the lava flows.   The best lava viewing (if there is none on the surface) is the fall out of the lava tube into the sea.    This is at the very end after you pass all the steam coming out of the ocean.  Since the wind is from the northeast (trade winds) you can see best after you get on the northeast side of the flow.   Depending on how far from the end of the road you park this is about an hour hike in and out.   Bring good walking shoes and water.  Air quality may be poor as volcano gases are acid and irritating especially to people with lung problems.