Some events may require reservations or advance ticket purchases. Call before you visit.

HOLIDAYS AT MOUNT VERNON -- Through Jan. 6, daily 9 to 4. Tour the first president's last home decorated for the holidays. $11, seniors $10.50, ages 6 through 11 $5, younger free. Mount Vernon, at the southern end of George Washington Parkway about eight miles south of Alexandria. 703-780-2000.

"A NORWEGIAN CHRISTMAS" -- Model train displays and exhibitions of Norwegian design, architecture and photography open during station hours through Jan. 8. Main Hall, Union Station, 50 Massachusetts Ave. NE. 202-289-1908.

"THE FIRST NOEL" -- Open Mondays-Saturdays 10 to 4, Sundays 1 to 4, through Jan. 8. An exhibition of nativity scenes and creches from around the world. Free. Washington National Cathedral, Wisconsin and Massachusetts avenues NW. 202-537-6200.

"CHRISTMAS AT OATLANDS" -- Open Mondays through Saturdays 10 to 4, Sundays 1 to 4, through Dec. 30 (closed Dec. 24-25). Tour the 19th-century Federal mansion, decorated for the holidays. $10, seniors $9, ages 6 to 16 $7, ages 5 and younger free. Candlelight tours with refreshments, Dec. 3, 10 and 17 from 5:30 to 8:30; $12, ages 6 to 16 $8, ages 5 and younger free. Oatlands, six miles south of Leesburg on Route 15. 703-777-3174.

ST. ALBANS SCHOOL HOMES TOUR -- Dec. 2 from 11 to 5, Dec. 3 from 10 to 4. Tour five homes in the Wesley Heights neighborhood decorated for the holidays; $35. Luncheon available both days from 11 to 2:30; $15. Purchase tickets at St. Albans School, Wisconsin and Massachusetts avenues NW. 202-537-3190.

MOUNT VERNON BY CANDLELIGHT -- Dec. 2-4 and Dec. 9-11 from 5 to 8. Tour the estate, decorated for the holidays, concluding with caroling and refreshments around a campfire. $15, ages 11 and younger $8. Advance purchase requested. Mount Vernon, at the southern end of George Washington Parkway about eight miles south of Alexandria. 703-780-2000.

"A PLANTATION CHRISTMAS" -- Dec. 2 and Dec. 3 from 6:30 to 9:30. An 18th-century holiday at the mansion, with living history portrayals, music and horse-drawn carriage rides. $14, ages 6 to 18 $7, younger free. Gunston Hall Plantation, 10709 Gunston Rd., Lorton. 703-550-9220.

WINTER'S EVE CELEBRATION -- Dec. 3 from 5 to 8. Holiday open house at the 18th-century farmhouse with seasonal decorations, refreshments and entertainment. Free. National Colonial Farm in Piscataway Park, 3400 Bryan Point Rd., Accokeek. 301-283-2113.

CULPEPER HOUSE TOUR -- Dec. 3 from 11 to 4:30. Visit eight historic homes in downtown Culpeper decorated for the holidays. Sponsored by South East Neighborhood Watch. $20. Purchase tickets at Museum of Culpeper History, 803 S. Main St., Culpeper, Va. 540-825-8200.

HERNDON HOMES TOUR -- Dec. 3 from 11 to 5. Self-guided tour of homes spanning 100 years of local history, decorated for the holidays. $15. Begin at the Herndon Depot Museum, 717 Lynn St., Herndon. 703-437-7289.

HOLIDAY IN THE PARK -- Dec. 3 from 3:30 to 6. Tours of Lanesville Heritage House, wagon rides, snacks. Free. Donations of new mittens, hats and scarves encouraged. Claude Moore Park, 21544 Old Vestals Gap Rd., Sterling. 703-444-1275.

CLIFTON CANDLELIGHT TOUR -- Dec. 3 from 4 to 7:30. Visit five homes decorated for the holidays and hear music in the town's three churches. Shuttle service provided. $15. Purchase tickets at Clifton Coffee Mill, 7144 Main St., Clifton. 703-322-1811 or 703-830-2129.

MUSEUM OPEN HOUSE -- Dec. 3 from 4:30 to 6:30. Tour the museum, which displays a collection associated with President James Monroe, decorated for the holidays. Free. James Monroe Museum, 908 Charles St., Fredericksburg. 540-654-1043.

TWILIGHT MANSION TOURS -- Dec. 3-18, Saturdays and Sundays at 6. Tour the mansion, decorated for the holidays. $8. Long Branch House Museum, 830 Long Branch Lane, Millwood, Va., about 65 miles west of Washington. 888-558-5567.

CANDLELIGHT TOURS -- Dec. 3-5 from 6 to 8:30. Historical reenactors, seasonal decorations, music, storytelling, demonstrations of customs from the Federal, Civil War and Victorian eras. $4, ages 4 to 18 $2, younger free. Marietta House Museum, 5626 Bell Station Rd., Glenn Dale. 301-464-5291 (TDD: 301-699-2544).

"CHRISTMAS HOUSE" -- Dec. 3-4 from 11 to 4, Dec. 5-9 from 11 to 3, Dec. 10-11 from 11 to 4. Tour a 100-year-old house decorated for the holidays by area designers. $15. Springhill Center for Family Development, 1134 Bacon Ridge Rd., Crownsville. 410-923-8900.

BALTIMORE HOLLY TOUR -- Dec. 4 from 11 to 5. Visit 13 historic buildings in Baltimore's Mount Vernon neighborhood. Purchase tickets at Eubie Blake Jazz Center, 847 N. Howard St., Baltimore. 443-524-2370.

ST. GEORGE HOME TOUR -- Dec. 4 from 11 to 4. Tour nine homes, decorated for the holidays, on the 400-acre St. George Island, established in 1634, off Route 249 in St. Mary's County. $30. Purchase tickets at St. George Island Improvement Association. 301-994-2765.

"CHRISTMAS IN LITTLE WASHINGTON" -- Dec. 4 from 12:30 to 4. Entertainment, children's activities and open houses throughout Washington, Va.; parade on Main Street at 12:30. 540-675-3207 or 540-675-3757.

LOGAN CIRCLE HOLIDAY HOUSE TOUR -- Dec. 4 from 1 to 5. Self-guided tour of historic homes, modern lofts at 14th Street art galleries in the Washington neighborhood. $15 in advance, $20 at door; start at 1324 Vermont Ave. NW. 202-489-4553 or 703-298-2888.

BELAIR BY CANDLELIGHT -- Dec. 4 from 4 to 7. Tour the mansion decorated for the holidays. $3. Belair Mansion and Stable, 12207 Tulip Grove Dr., Bowie. 301-809-3089.

HOLIDAY TOURS -- Dec. 6-31, Tuesdays-Sundays from noon to 4. Tour the 1815 house decorated in the fashion of the early 1900s, with refreshments. $3, seniors and students $2. Beall-Dawson House, 103 W. Montgomery Ave., Rockville. 301-762-1492.

DAR CHRISTMAS OPEN HOUSE -- Dec. 7 from 5:30 to 8. Tours of the period rooms decorated for the holidays, music and a visit from Santa. Free. Daughters of the American Revolution Memorial Continental Hall, 18th and D streets NW. 202-572-0563.

CANDLELIGHT TOURS -- Dec. 8-10 from 6 to 9, with seasonal decorations and live music. $3, ages 5 to 18 $1, younger free. Montpelier Mansion, Muirkirk Road and Route 197, Laurel. 301-953-1376.

CANDLELIGHT TOURS -- Dec. 9 from 7 to 9. Seasonal decorations, living history portrayals, children's crafts, refreshments. $10, ages 11 and younger free. Dumbarton House, 2715 Q St. NW. 202-337-2288, Ext. 450.

"MUSEUMS BY CANDLELIGHT" -- Dec. 10 from noon to 5 at Frederick County locations, and 2 to 7 at Frederick City locations. Self-guided tour of Frederick museums and historic sites. Donations. Pick up brochure at Frederick Visitor Center, 19 E. Church St., Frederick. 301-644-4047.

EASTERN SHORE HOUSE TOUR -- Dec. 10 from 1 to 5. Visit homes, inns and public buildings in Chestertown, Rock Hall and Kent County, Md. $15. Purchase tickets at Emmanuel Church, 101 N. Cross St., Chestertown. 410-639-7448.

HOLIDAY OPEN HOUSE -- Dec. 10 from 2:30 to 5. Tour the museum decorated for Christmas times in both the Colonial and Victorian eras. Free. Weems-Botts Museum, 3499 Cameron St., Dumfries. 703-221-2218.

MANOR OPEN HOUSE -- Dec. 10 from 3 to 6, with entertainment and refreshments. Snow Hill Manor, 13301 Laurel-Bowie Rd., Laurel. 301-725-6037.

LAUREL HOUSE TOUR -- Dec. 10 from 3 to 7. Visit eight historic homes decorated for the holidays. $15 in advance, $18 on tour day. Purchase tickets at Laurel Museum, 817 Main St., Laurel. 301-561-4252.

ALEXANDRIA CANDLELIGHT TOURS -- Dec. 10 from 5 to 9. Self-guided tours of historic sites in Old Town Alexandria, including Gadsby's Tavern Museum and Lee-Fendall House. $20, seniors $15, ages 6 at 17 $5; start at Gadsby's Tavern Museum, 134 N. Royal St., Alexandria. 703-838-4242.

"CHRISTMAS THROUGH THE AGES" -- Dec. 10 from 5 to 8:15, Dec. 11 from 5 to 7:15. Candlelight tours of the 1794 mansion, decorated for the holidays, with seasonal music. $8, seniors and children $6. Sully Historic Site, 3601 Sully Rd., Chantilly. 703-437-1794.

NAVY YARD BY CANDLELIGHT -- Dec. 10 at 7. Tour the Washington Navy Yard by candlelight with docents from the Navy Museum. Reservations required. Washington Navy Yard, Sixth and M streets SE. 202-433-6897.

"CHARLES DICKENS IN WASHINGTON" -- Dec. 10, 17 and 24 at noon. Walking tour of Washington sites visited by author Charles Dickens, with an adaptation of "A Christmas Carol" performed by local actors. $10, ages 11 and younger $5. Start at 10th and E streets NW. 301-588-9255.

"AN ANTEBELLUM CHRISTMAS" -- Dec. 11 from noon to 4. Open house at the 19th-century mansion. Nature walk at 12:30; music by the Good Samaritan Presbyterian Church Handbell Choir at 2. Free. Mount Aventine, Chapman State Park, Chapman's Landing Road at 3452 Ferry Pl., Indian Head. 301-753-6754.

HOLIDAY OPEN HOUSE -- Dec. 11 from 1 to 3. Music and refreshments in the 1780 manor house. Green Spring Gardens, 4603 Green Spring Rd., Alexandria. 703-941-7987.

HOLIDAY TEA -- Dec. 11 at 2, in a 19th-century farmhouse. $22. Cherry Hill Farmhouse, 312 Park Ave., Falls Church. 703-248-5171.

BROOKLAND LIGHTS TROLLEY TOUR -- Dec. 11 from 6 to 9, tour Washington's Brookland neighborhood by trolley. Donations. Start at Brookland Visitors Center, 3420 Ninth St. NE. 202-529-8400.

HOLIDAY OPEN HOUSE -- Dec. 17 from 10 to 4. Films, talks and other activities. Free. Alexandria Black History Museum, 902 Wythe St., Alexandria. 703-838-4356.

"SANTA'S BIG BROADCAST" -- Dec. 17 from 1 to 5. Rebroadcasts of vintage Christmas radio and TV shows, and displays of radio, television and broadcast memorabilia. Donations. Radio and Television Museum of Bowie,

2608 Mitchellville Rd., Bowie. 301-390-1020.

VICTORIAN CANDLELIGHT TOUR -- Dec. 17-18 from 5 to 9, Dec. 19 6 to 9. Displays of 19th-century cards and decorations, antique dolls, Civil War Santa. $3, seniors $2, ages 5 to 18 $1. Surratt House Museum, 9118 Brandywine Rd., Clinton. 301-868-1121.

MANSION TOURS -- Dec. 18 at 5 and 6. Tour the 1787 mansion, decorated for the holidays. $8, ages 6 to 16 $4, younger free. Reservations deadline Dec. 14. Poplar Hill on His Lordship's Kindness, 7606 Woodyard Rd., Clinton. 301-856-0358.

"WINTER EVENINGS" -- Dec. 29-30 from 7 to 9. Mansion tours by candlelight, children's activities, refreshments. $5, ages 12 and younger free. Riversdale House Museum, 4811 Riverdale Rd., Riverdale Park. 301-864-0420.

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