One day may not be enough time to completely explore the unique ecosystems of Olympic National Park, but it's long enough to understand how Washington got its nickname: the Evergreen State.

New Mexico Highway 4 climbs steadily, sometimes steeply, west out of Los Alamos, through forests scorched by wildfire in recent decades, and over a pass at the top of Bandelier National Monument. The road drops slightly then bursts out of the trees. Spread suddenly before us is a vast grassland, the Valle Grande, in Valles Caldera National Preserve, a recent addition to the national park system. This huge meadow seems the bottom of a bowl and we are on its south rim. Eleven miles to the north is the north rim of the caldera, rising to 10,000 feet. The 87,000-acre National Preserve, established in 2000, was placed under the care of the National Park Service in 2015.

Known as the “Crown of the Continent,” I prefer to think of Glacier National Park as the Crown Jewel of the National Park System. I was born 24 miles away from this setting of pine-, cedar-, and fir-fragrant forests, rugged mountains, glacial U-shaped valleys, abundant wildlife, flower-filled fields, pristine lakes and trail choices suitable for all walks of life.

In far south Arizona, so far south that you could cross into Mexico if you wanted, there's an oasis in this prickly Sonoran Desert landscape that has been drawing thirsty travelers for centuries. Protected by Organ Pipe Cactus National Monument, Quitobaquito Springs has many stories to tell.