It’s National Lighthouse Day! Few images are as evocative as a lighthouse standing sentry on a rocky shore, the guardian of mariners and passengers as they navigate the formidable currents, fierce storms and shifting shoals of America’s coastal and inland waterways. Although their form and appearance vary according to region or the body of water they guard, the lighthouse remains one of the most recognizable images of the maritime world. You can find many of these historic and majestic buildings on public lands across the country. Just follow the light.