Getting outside can be as simple and accessible as a short walk in the neighborhood, experts say.
Timothy Schenck

A man rock climbing at the Saddle Boulders on Donner Summit near Truckee, California.
Rachid Dahnoun

Today, America's 100 largest cities are home to nearly 24,000 parks. But over 11 million residents still don't have a park within a 10-minute walk. Our data helps planners pinpoint where new parks will make the most difference.
Jenna Stamm

Since its roots as a five-acre farm run by 12 volunteer interns, MA'O has grown into the largest organic farm in Hawaii. Hundreds of young people have graduated as interns and grown into leaders and advocates for their communities.
Anra Photography, Inc.

NPS ranger Corinne Fenner gives a nature talk at Congaree National Park, NPS ranger Corinne Fenner gives a nature talk at Congaree National Park in Hopkins, South Carolina. National Park Service, outdoor education, nature walk, 2008, SC, Congaree, Natural Lands, Hopkins, Congaree National Park, Forests | Recreation, Darcy Kiefel
Darcy Kiefel