10 must-see sights on Hawaii's Big Island

Hawaii's Big Island is the largest island in the Hawaiian archipelago and one of the most surprising, almost otherworldly, things to see on the island is the hardened black lava that abounds on the Kona-Kohala coastline.

Fields stretch as far as the eye can see, and are the results of a Mauna Loa volcano eruption about 200 years ago. Driving along the Kona-Kohala coast, you'll see a peculiar form of graffiti: Names, places, phrases are spelled out in white stones, contrasting against the black lava. Beachside, visitors gather dead white coral and then bring it to the fields to form their "graffiti," or they simply rearrange the coral that's already there.