Airmen Memorial Museum

5211 Auth Rd., Suitland

301-899-3500

This privately run museum documents men and women behind the growth of aviation. Open 8 a.m.-5 p.m. Monday-Friday. Free admission.

Antique Chesapeake Carousel and Miniature Train

Watkins Regional Park

301 Watkins Park Dr., Upper Marlboro

301-218-6761

The park features an authentic, hand-carved, hand-painted, 80-year-old carousel. Featured on the carousel are 45 animals including kangaroo, jackass, goat and seahorse. The carousel and train are open from Memorial Day through Labor Day, 10 a.m.-7 p.m. Tuesday-Sunday. Admission: $1.25, or $1 for bi-county residents; groups of 10 or more, $1 each, or 75 cents each for bi-county residents. Mini golf, $3.50, or $3 for bi-county residents.

Belair Mansion

12207 Tulip Grove Dr., Bowie

301-809-3089

The mansion is open 1-4 p.m. Thursday-Sunday, and for groups of 10 or more by appointment. A donation is requested at the door. Belair is available for rentals, weddings, receptions and other functions for groups of up to 75 people. For information on rentals or to schedule a group tour, call the mansion at 301-809-3089.

Belair Stable Museum

2835 Belair Dr., Bowie

301-809-3089

The Belair Stable was part of the famous Belair Stud, one of the premier racing stables in the 1930s through the 1950s. Often called "the Cradle of American racing," it was home to Gallant Fox and Omaha, the only father and son horses to win the famed Triple Crown. Belair was also home to Nashua, the 1955 Horse of the Year and many other well-known racehorses. Now a museum, the restored stable's history extends over 250 years. Group tours available by appointment. Open 1-4 p.m. Thursday-Sunday. Free.

Billingsley House Museum

6900 Green Landing Rd., Upper Marlboro

301-627-0730

Located on 430 acres overlooking the confluence of the Patuxent River and the Western Branch, Billingsley is an early brick plantation home built around 1740. Also featured is the Billingsley Farm Museum adjacent to the house. It is a restored tobacco barn with a collection of antique farm equipment. Tours available noon-4 p.m. Sundays. Weekday group tours of 10 or more by appointment. $3; young children, free.

Bowie Railroad Station/Huntington Museum

8614 Chestnut Ave., Bowie

301-809-3089

This museum contains a collection of restored historic Pennsylvania Railroad buildings including freight building, switching tower and passenger waiting shed. Also includes a 1920s Norfolk and Western Caboose. Group tours available by appointment. Open noon-4 p.m. Saturdays and Sundays. Free.

College Park Airport and Aviation Museum

1985 Cpl. Frank Scott Dr., College Park

301-864-6029

College Park Airport, established in 1909, is the world's oldest continuously operating airport. It is perhaps only second in importance to Kitty Hawk in the first 25 years of American aviation history. The airport is also home to the College Park Aviation Museum, which displays a number of historic flying machines, including a 1911 Wright B and a 1918 Curtis Jenny, an animatronic Wilbur Wright and aviation simulators. There is also an aviation theme restaurant adjacent to the museum. The museum is open 10 a.m.-5 p.m. daily but is closed for major holidays. Group tours available by appointment. Free.

Darnall's Chance House Museum

14800 Gov. Oden Bowie Dr.,

Upper Marlboro

301-952-8010

Darnall's Chance was built around 1742 by James Wardrop, a wealthy Scottish merchant. It is one of the oldest houses in Upper Marlboro and was remodeled in 1857 in the Italianate style. In 1986, the house was saved from proposed demolition and restored to its original Georgian appearance. The property includes a unique 18th-century brick burial vault. It was the residence of Col. Henry Darnall and is believed to be the birthplace of Daniel Carroll, signer of the U.S. Constitution, and his brother, John Carroll, first bishop of the Roman Catholic Church of America. Walk-in tours, noon-4 p.m. Sundays; 10 a.m.-4 p.m. Fridays. Other tours and group arrangements by appointment. Free.

Dorsey Chapel

10704 Brookland Rd., Glenn Dale

301-352-5544

Dorsey Chapel is a small frame meetinghouse-styled church that was the focal point of rural African American communities in the county during the 1900s. The chapel was dedicated in September 1900 and was actively used until 1971. It was restored in 1994. It has been designated a historic site by the Prince George's County Historic Preservation Commission. Walk-in tours are 11 a.m.-3 p.m. Fridays or by appointment. Groups by appointment. Adults, $1.50; seniors, $1; students, 50 cents.

Duvall Tool Museum

16000 Croom Airport Rd., Upper Marlboro

301-627-6074

Part of the Patuxent Rural Life Museums, the Tool Museum is located at Patuxent River Park and houses more than 1,000 farm implements, tools and household items from the 19th century. Open April through October, 1-4 p.m. Sundays. Tours are available at other times by appointment. Free.

Fort Foote Park

Fort Foote Rd., Oxon Hill

301-763-4600

Fort Foote was constructed during the Civil War to guard the river route to Alexandria, Washington and Georgetown. The fort's remains, now a local park, contain Rodman guns and other remnants. Open 10 a.m.-dark. Closed most major holidays. Admission is $5 per vehicle.

Fort Washington Park

13551 Fort Washington Rd.,

Fort Washington

301-763-4600 This large brick-and-stone fort, on the Maryland shore of the Potomac River, was the only permanent fort ever built to defend the U.S. capital. The first fort was built in 1809. It was destroyed by the British during the War of 1812, then subsequently rebuilt as an outer defense of the capital. Open 9 a.m.-5 p.m. daily. The fort displays cannons, ramparts, earthworks and a drawbridge. Interpretive history tours are also available. Admission is $5 per vehicle.

Greenbelt Museum

10-B Crescent Rd., Greenbelt

301-507-6582

Greenbelt is a National Historic Landmark planned community that was designed and built by the federal government during the Great Depression. The idea was to create a small utopia, using principles of garden city planning. The museum is restored and furnished with furniture designed by the government to fit these homes. The museum presents interpretive exhibits in the Art Deco-style Community Center at 15 Crescent Rd. A historic house is open 1-5 p.m. Sundays and by appointment. The Community Center Exhibit Gallery is open 9 a.m.-9 p.m. daily. Free.

Laurel Museum

Ninth and Main Streets, Laurel

301-725-7975

This 1830 city-owned house, probably the oldest structure in Laurel, houses the collections of photographs, tools, personal artifacts, textiles and histories of religious, social, business and cultural growth in a thriving mill town of the early 19th century. Open 10 a.m.-2 p.m. Wednesdays; 1-4 p.m. Sundays. Group tours by appointment. Free.

Marietta House Museum

5626 Bell Station Rd., Glenn Dale

301-464-5291

Marietta House was the plantation home of Gab Duvall, a member of the Maryland General Assembly and the Maryland Supreme Court, and an associate justice in the U.S. Supreme Court. Three generations of Duvalls occupied the house from 1815 to 1900. It is also headquarters of the Prince George's County Historical Society and F.S. DeMarr Memorial Library of County History. Open 11 a.m.-3 p.m. Fridays; noon-4 p.m. Saturdays and Sundays. Open weekdays by appointment. Adults, $3; seniors, $2; children, $1.

Montpelier Mansion

9401 Montpelier Dr., Laurel

301-953-1376

This Georgian mansion and sprawling grounds was in 1783 by Major Thomas Snowden. The mansion has hosted many famous guests, including George and Martha Washington, and Abigail Adams. Tours available noon-4 p.m. Sunday-Thursday except in January and February when tours are held 1-2 p.m. Sundays. Luncheon tours for 20 or more are available. Group tours by appointment. Adults, $3; seniors, $2; children, $1.

NASA Goddard Space Flight Center

Soil Conservation Rd., Greenbelt

301-286-9041

The hub of all NASA tracking activities, Goddard is also responsible for the development of unmanned sounding rockets and research in space and earth sciences, including NASA's Mission to Planet Earth. Through interactive educational exhibits, visitors explore Goddard Space Flight Center with a focus on 1958 to present. Collections include space flight artifacts and photographs. Model rocket launchings, gift shop and special group tours available. Open 9 a.m.-4 p.m. Monday-Friday, reservations by appointment only. Free.

National Archives II

8601 Adelphi Rd., College Park

202-501-5205

The Archives is the current home of the Richard Nixon/Watergate tapes. In addition, this state-of-the-art archival facility houses an extensive collection of important and historic documents, tapes and film. 8:45 a.m-6 p.m. Monday-Saturday. One-hour tours are available with reservations.

National Colonial Farm

3400 Bryan Point Rd., Accokeek

301-283-2113

An agricultural-historical museum project of the Accokeek Foundation, the farm offers exhibits and demonstration of agricultural methods, crops and livestock of a modest Tidewater farm of the mid-18th century. It is across the Potomac River from Mount Vernon. Open March 15 through Dec. 15, 10 a.m.-4:30 p.m. Tuesdays-Sundays; from Dec. 16 to March 14, the farm is open only Saturdays and Sundays; public tours are Saturdays, 1-3 p.m. Other tours by reservation. Free.

Northampton Slave Quarters Archeological Historical Park

100700 Lake Overlook Dr., Mitchellville

301-627-1286

This park features the rebuilt foundations of two 19th-century slave quarters. Interpretive signs allow for self-guided tours. Open 8 a.m.-8 p.m. daily. Free.

Oxon Hill Farm at Oxon Cove Park

6411 Oxon Hill Rd., Oxon Hill

301-839-1176

Oxon Cove Park is a historical farm with buildings dating back to the early 1800s when the property was a wheat plantation. A variety of daily farm activities and programs are held throughout the park's 512 acres. Open 8 a.m.-4 p.m. daily. Groups must reserve to participate in programs. Free.

Oxon Hill Manor

6901 Oxon Hill Rd., Oxon Hill

301-839-7782

Built in 1929, Oxon Hill Manor was designed by Jules Henri de Sibour. The 49-room, two-story Neo-Georgian-style brick mansion is on the National Register of Historic Places. It sits on 55 acres and has English gardens overlooking a rose-wrapped reflecting pool, expansive lawns, and a wide-open terrace with views of the Potomac River. Open 9 a.m.-4 p.m. Monday-Friday, by appointment only.

Radio and Television Museum

This museum is administered by the Radio History Society Inc. and is part of the City of Bowie Museums. Call for information on events. Open 1-4 p.m. Saturdays and Sundays. Free.

2608 Mitchellville Rd., Bowie

301-809-3089

Riversdale House Museum

4811 Riverdale Rd., Riverdale Park

301-864-0420

A National Historic Landmark, Riversdale is a restored, five-part, stucco-covered brick plantation home built between 1801 and 1807. The mansion blends both Flemish and American architectural styles. Open year-round, noon-4 p.m. Fridays and Sundays. Tours Monday-Saturday by appointment. Adults, $3; seniors, $2; children, $1. All children 4 and under are free.

Smithsonian National Air & Space Museum's Paul E. Garber Facility

3904 Old Silver Hill Rd., Suitland

202-357-1400

Established in the mid-1950s as a depository of National Air & Space Museum's reserve collection. This no-frills museum houses many historically significant air and spacecraft and functions as a storage, restoration and preservation center. The story of flight history and preservation are told in a simple and realistic setting. Tours available 10 a.m. Monday-Friday; 10 a.m. and 1 p.m. Saturday and Sunday. Tours last between two and three hours. Special tours for handicapped visitors are available upon request. Reservations are required. Free. Closed for renovations until fall 2003.

Sojourner Truth Room

Oxon Hill Library

6200 Oxon Hill Rd., Oxon Hill

301-839-2400

The Oxon Hill Library is built on the site of the Sojourner Truth Elementary School. The Sojourner Truth Room was established in 1967 and named in honor of the civil rights activist. It contains a collection of books, periodicals, pamphlets, photographs and other material on African American history and culture. The library is open to the public. Currently closed for renovations, it will reopen in fall 2003.

Surratt House Museum

9118 Brandywine Rd., Clinton

301-868-1121

The Surratt House was built in 1852 for the Surratt family. This middle-class plantation home served as a tavern, post office and Confederate safe house during the Civil War. In fall 1864, the Surratts became involved in a plot to kidnap President Abraham Lincoln. After the plan had changed to murder in April 1865, the assassin John Wilkes Booth stopped here briefly as he fled Washington. Group tours by appointment. The John Wilkes Booth Escape Route Tour is held throughout the year. Surratt House is open mid-January to mid-December, 11 a.m.-3 p.m. Thursdays and Fridays; noon-4 p.m. Saturdays and Sundays. Adults, $3; seniors, $2; children, $1; children under 5, free.

Tobacco Farming Museum

16000 Croom Airport Rd.,

Upper Marlboro

301-627-6074

Part of the Patuxent Rural Life Museums, the Tobacco Farming Museum is a legacy of the rich agricultural heritage of Prince George's County. Located at Patuxent River Park, it features exhibits about the history of tobacco in Maryland. Open April through October, 1-4 p.m. Sundays, or by appointment. Admission is $5 for a yearlong pass.