We found out about an arch along the southern end of the Big Sur coast from a Facebook posting from an avid hiker we're following. She mentioned where she was and included several photos, including an arch in the Pacific Ocean. It was actually next to a campground we were already thinking about visiting, so her posting made us take the trip to see it sooner rather than later. We saw it first during a higher tide, with waves crashing under the arch. We came back about 6 hours later and the tide was low enough that we could stand under it. We took measurements with a laser measurer and reported our results to the Natural Arch and Bridge Society. It turned out that we were the first to report this arch to them.
Remember, it's not just a picture, it's a story!