Tomorrow evening marks the 16th year in which Watkins Regional Park will light up the neighboring community. This year's "Winter Festival of Lights" features a trail of more than 500,000 twinkling lights spread along a 2.5-mile drive. The path is decorated with stationary and animated displays, including a 56-foot Christmas tree, stuffed Santas, reindeer and toy soldiers. Employees of Watkins Park are collecting canned goods from visitors for donation to local food banks. The Winter Festival of Lights is open from 5 to 9 p.m. tomorrow through Jan. 5 at Watkins Regional Park, 301 Watkins Park Dr., Upper Marlboro. The cost for the drive-through, self-guided tour is $5 for cars and vans; $15 for minibuses or limos; $25 for buses; or $10 for five visits for cars and vans. There is no charge on Christmas day. 301-699-2456.


Cold weather always makes indoor activities more attractive. On Sunday, visitors to the Billingsley House Museum, one of the oldest houses in the county, can gaze at the scenic 430 acres of land overlooking the Patuxent River from the warmth of the brick Tidewater Colonial. Built around 1740 as a home for the Weems family, the house is named for Maj. John Billingsley, who obtained the original land grant from the second Lord Baltimore in 1662. The house was owned by several prominent families and was renovated in the mid-19th century. From noon to 4 p.m. Sunday, museum interpreters will offer special tours at 6900 Green Landing Rd., Upper Marlboro. The fee is $3 for adults; $2 for seniors; $1 for ages 5-18; and free to those 4 and younger. 301-627-0730.


Cletus Kennelly, an award-winning songwriter whose music blends contemporary urban folk with elements of melodic pop and alternative rock, will give a free performance Tuesday at the Clarice Smith Performing Arts Center on the College Park campus of the University of Maryland. As part of the center's "Take Five" series, Kennelly will sing and play his 12-string guitar. On selected Tuedays, the center hosts its free series, which was established last year to offer the community an interactive, informal opportunity to experience a range of artistic performance. The series has included traditional Irish music, political theater, dance theater and Latin jazz. Kennelly will play from 5:30 to 7 p.m. in the Laboratory Theatre of the Clarice Smith Performing Arts Center, at University Boulevard and Stadium Drive in College Park. 301-405-2787.