The U.S. Fish and Wildlife Service manages an unparalleled network of public lands and waters called the National Wildlife Refuge System. With more than 560 refuges spanning the country, this system protects iconic species and provides some of the best wildlife viewing opportunities on Earth.

Each unit of the Refuge System — whether it is a wildlife refuge, a marine national monument, a conservation area or a waterfowl production area — is established to serve a statutory purpose that targets the conservation of native species dependent on its lands and water. All activities on those acres are reviewed for compatibility with this statutory purpose.

The Refuge System deploys a host of scientifically sound management tools to address biological challenges. These tools, which range from active water management to wilderness character monitoring, all are aimed at ensuring a balanced conservation approach that enables wildlife and people to thrive. 

U.S. Fish and Wildlife Services is the only agency in the federal government whose primary responsibility is the conservation and management of fish, wildlife, plants and their habitats for the American People.

For the complete list of the facilities, you can search here, or see this list on Wikipedia

Reference: United States Fish & Wildlife Service https://www.fws.gov