No need to be shut in during the winter when there are so many gardens and nature centers where your family can enjoy the outdoors while keeping fit and active. Get out and explore!

1 BARTRAM'S GARDEN

One of the nation's oldest botanical gardens has 45 acres filled with recreational activities. Admission for some exhibits. 54th Street and Lindbergh Boulevard, 215-729-5281, bartramsgarden.org.

2 SCHUYLKILL

ENVIRONMENTAL CENTER

Learn about and experience nature at this preserve on the banks of the Schuylkill River. Free. 8480 Hagy's Mill Road, 215-482-7300, schuylkillcenter.org.

3 MORRIS

ARBORETUM

Get inspired and fit in this lovely environment of formal gardens and natural woods. See the Holiday Garden Railway through Dec. 31. Admission. 1001 Northwestern Ave., 215-247-5777, morrisarboretum.org.

4 TYLER ARBORETUM

Among its notable offerings, Tyler has 20 miles of hiking trails through woodlands, wetlands and meadows. Lots of family events. Admission. 515 Painter Road, Media, 610-566-9134, tylerarboretum.org.

5 LONGWOOD GARDENS

The big daddy of local gardens has 1,050 acres to explore. A holiday favorite. Admission. 1001 Longwood Road, Kennett Square, 610-388-1000, longwoodgardens.org.