Pick your own fruits and vegetables at Larriland Farm in Woodbine, MD. Plan your visit around the vegetable harvest calendar and the fruit harvest calendar. Call or check the website on the day of your visit to find out what crops are available. Free admission. www.pickyourown.com/todays-harvest/

Identify different kinds of butterflies desert and so much more at the Smithsonian Butterfly Habitat Garden. The 11,000-square-foot garden has wetland, meadow and wood’s edge areas to entice butterflies that are attracted to the various plants and flowers. You might see monarch, painted lady and tiger swallowtail butterflies. $$. naturalhistory.si.edu/butterflies/

Stroll through 446 lush acres at the U.S. National Arboretum Walk through the Friendship Garden, and then have a picnic lunch in the National Grove of State Trees. Free. usna.usda.gov

Explore 95 acres of gardens and unique plant collections at the Meadowlark Botanical Gardens in Vienna, VA. Walk through the Butterfly Garden or the Potomac Valley Collection, which is home to native plants and a hardwood forest. Call ahead to arrange a tour of the gardens for you and your family. $$ (Free for children under 6). nvrpa.org/park/meadowlark_botanical_gardens

Head out for an island safari at Theodore Roosevelt Island. Park rangers lead guests on a guided tour, a great way to get the inside story. Explore the Potomac River by kayak or observe the different kinds of birds, including warblers and wading birds, and enjoy a variety of trails for walking or running. Free. nps.gov/this/index.htm

Hike around the ponds at the Kenilworth Park & Aquatic Gardens in Washington, D.C. Watch songbirds fly across the sky, explore the marsh by canoe or become a Junior Ranger by completing an activity booklet. Free. nps.gov/keaq

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