Sean & Zorro's place is amazing. It is literally on the lava field on the coast of the big island. The location is the major selling point - it's a unique opportunity to stay in such a rugged looking place. It's also within walking distance of an active lava flow into the ocean - it's a good hike (4 miles each way), but you can rent a bike to make it easier. Either way, it's absolutely worth it.
It was crazy windy the night I was there, but once the wind died down, it was one of the most dazzling night skies I had ever seen.