This is a massive sea arch near Pollara on the island of Salina, off the north coast of Sicily. By luck, if you squint, you can see the island of Stromboli through the arch. Laura and family took us out on their boat for a circumnavigation of Salina, and this point is on the far side of the island, opposite of Santa Marina, where the ferry docks and where we spent most of our time.
This picture was taken from the water, floating above an ancient, collapsed caldera. Salina has two old volcanos on it, and this was a third. As you can see, it is a very beautiful place. Many thanks to Laura for making it possible for us to see it.
More photos from our July trip to Sicily and Salina are available here.