America’s 95,000 miles of coastlines are among the most scenic on the planet, from sandy white beaches to lush marshes to rocky cliffs. And yet, our coasts remain threatened. Coastal habitats can be destroyed by development, overfishing, pollution and even the dredging of sea canals. Luckily, marine advocacy and conservation alliances abound to preserve these coastlines. We’ve rounded up 10 compelling images of America’s shores with information on some of the organizations that help keep them that way.