The U.S. National Wildlife Refuge system protects some 150 million acres of land and water habitat from coast to coast, with at least one refuge in every state. The 570 refuges in the system, as well as another 38 wetland management districts, protect more than 220 species of mammal, 700 species of birds, over 1,000 species of fish, and 250 reptile and amphibian species. And 380 endangered or threatened plants and animals find sanctuary in these special places.

To find the best places to spot wildlife within the system, we asked an expert panel to nominate their top protected areas, and then our readers voted for their favorites. Here are the 10 best national wildlife refuges in the United States.