Green Sand beach is a beach located in a hidden crater on the coast.   The green sand is a semi-precious stone which formed in the lava and is released with the break of the lava stone.  The beach is a crater where the softer ash has become the beach.  It is about a 4 mile hike to the beach from the boat launch at south point (the road that forks to the left ).   It is recommended you wear sturdy shoes as the trail has both rocky gravel and sand.  It is also recommended that you leave no valuables in your car, as it is unprotected.