The District and Virginia have some of the best parks in the nation.

The non-profit Trust for Public Land rated D.C. fourth for in the nation for their city park systems. Arlington, Virginia was ranked sixth.

The organization bases its ParkScore rankings on three factors: park access, which looks at the how many people live within a 10-minute walk (or a half-mile) of a park; also park size; and how much cities invest into facilities.

Trust for Public Land says 98-percent of the Arlington's residents live within a 10-minute walk of a park while 97-percent of D.C. residents live with in a 10 minute walk.

According to the non-profit, the largest municipal park in D.C. is Oxon Run. It's 136 acres. The largest in Arlington is Glencarlyn Park with 96 acres.

Learn more about ParkScore rankings here.