Hōlei Sea Arch - Big Island Hawaii

In Hawaii Volcanos National Park, head all the way to the ocean and you can check out the Holei Sea Arch. It's estimated that this arch is only 100 years old, and has a limited life. It will eventually crumble and fall into the ocean. That makes this attraction a literal once in a lifetime experience! :) LOL

It's located at the end of the Chain of Creators road and you follow a small path to the ocean.

 Here's a view looking down to the lava viewing area: