Spilling Thought: Happy National Public Lands Day! To celebrate the national day that is dedicated to playing, learning, serving and working on our public lands, we’re waving the entrance fee for all national parks, wildlife refuges and other public lands -- including the J. Clark Salyer Refuge (pictured here) in #NorthDakota. This 58,700 acre refuge has a diverse mix of habitats -- from grass prairie and marshes to sandhills and woodlands -- that help support waterfowl, migratory birds and other wildlife. Photo by Gary Eslinger (@USFWS). by usinterior