Contributing photographer Rebecca Latson continues her explorations following the Washington state portion of the Lewis and Clark National Historic Trail. In her second photo column about the national historic trail, Rebecca writes about what she saw and photographed during her exploration of Beacon Rock State Park and the Mighty Columbia River.

It's cherry blossom time in Washington, D.C., with the rosé-hued flowers expected to peak between Tuesday and Friday this week.

The isolated and rugged Yellowstone region remained a “hole” in the map of North America until the 1870s. Indigenous North Americans knew the area well, but it was one of the last places on the continent to be explored by Euro-Americans.

Nearly a century after a series of canals was dug through Cape Sable to the Gulf of Mexico and Florida Bay, work to permanently seal them all is almost complete in another step towards restoration of the "river of grass."