7 Best Sights in Georgetown, Washington, D.C.

Career diplomat Robert Woods Bliss and his wife, Mildred, bought the property in 1920 and tamed the sprawling grounds into 10 acres of splendid gardens designed by Beatrix Farrand. In 1940, the Blisses gave the estate to Harvard University as a study center, library, museum, and garden. The museum holds a small but world-renowned collection of Byzantine and pre-Columbian art, reflecting the enormous skill and creativity developed at roughly the same time in two very different parts of the world. The Byzantine collection includes beautiful examples of both religious and secular items executed in mosaic, metal, enamel, stone, textile, and ivory. Pre-Columbian works—artifacts and textiles from Mexico and Central and South America by peoples such as the Aztec, Maya, Inca, and Olmec—are arranged in an enclosed glass pavilion. Especially beautiful in the spring but worth visiting in any season, the gardens feature an orangery and a green terrace filled with iron furniture emblazoned with astrological motifs.

George Washington was one of the first to advance the idea of a canal linking the Potomac with the Ohio River across the Appalachians. Work started on the Chesapeake & Ohio Canal in 1828. When it opened in 1850, its 74 locks linked Georgetown with Cumberland, Maryland, 185 miles to the northwest (still short of its intended destination). Lumber, coal, iron, wheat, and flour moved up and down the canal, but it was never as successful as its planners had hoped, due to damaging floods and competition from the Baltimore & Ohio Railroad. Today the canal is part of the National Park System; walkers and cyclists follow the towpath once used by mules, while canoeists paddle the canal's calm waters. During the summer months, visitors can go on a boat tour of the canal at the Great Falls Tavern Visitor Center (a 30-minute drive from Georgetown), where tour guides share the canal's history and operate the canal locks and boat just as they would have in the 1870s. Tours are free, but visitors must reserve one hour beforehand.

Not to be confused with the Dumbarton Oaks museum, a beautiful garden and research center a few blocks away, this circa-1799 brick mansion was once the home of the first U.S. Register of the Treasury, Joseph Nourse. Today it's the headquarters for The Colonial Dames of America. Visitors can tour the antiques-filled Federalist home, which often hosts concerts, theatrical performances, and other community events. Docent-led tours are available on the weekend, and the house is open for self-guided tours from Friday to Sunday. Timed tickets are required.

The country's oldest Catholic university (founded in 1789) does not offer architectural tours, but visitors can download a self-guided campus tour from the university's website. The 100-acre campus features a mix of architectural styles, with the most striking building being Healy Hall, a Victorian Gothic masterpiece whose construction nearly bankrupted the institution. Architects oriented its front toward the city, not the Potomac River, to signal its educational stature. Old North, modeled after Princeton's main hall, has hosted more than a dozen U.S. presidents. Also worth a peek is the turn-of-the-century Riggs Library, which boasts impressive cast-iron railings. At the southern end of campus, between M and Prospect Streets, a set of 75 super-steep steps were immortalized in the 1973 film The Exorcist. Less sinister beings—Georgetown's many joggers—can be seen running up and down the stairs when the sun rises.

Considered a best-kept secret of Washington, D.C.'s attractions, Oak Hill Cemetery functions as a public outdoor museum. Tucked away on R Street, away from the hustle and bustle of lower Georgetown, the cemetery is an idyllic space for nature and history lovers alike. Fans of George Saunders's best-selling novel Lincoln in the Bardo trek to this hillside corner of Georgetown near Rock Creek. Notable sights include a Gothic Revival chapel designed by James Renwick and the Carroll Family mausoleum, which, during the Civil War, briefly interred Abraham Lincoln's son Willie, who died in childhood from typhoid fever. In addition to visiting the places where notable figures reside, visitors will discover cenotaphs, sculptures, monuments, and inscriptions. Stop by the office for a free self-guided map.

Washington's oldest surviving building, this fieldstone house in the heart of Georgetown, was built in 1765 by a cabinetmaker named Christopher Layman. A succession of occupants used the house as a residence and business place until 1953 when the National Park Service purchased it. Over the next seven years, it underwent an extensive restoration that has preserved the building's Revolutionary War–era architecture and design. The furnishings of several of the rooms reflect the times, with the simple, sturdy artifacts—plain tables, spinning wheels, and so forth—of 18th-century middle-class life. You can take a self-guided tour of the house and its lovely English-style gardens.

Stop at Q Street between 31st and 32nd Streets, and look through the trees to the north, to the top of a sloping lawn, to see the neoclassical Tudor Place, designed by Capitol architect Dr. William Thornton for one of Martha Washington's granddaughters. Completed in 1816, the house remained in the family for six generations, hosting countless politicians, dignitaries, and military leaders. On the house tour, you can see the most extensive collection of George and Martha Washington items on public display outside Mount Vernon, Francis Scott Key's law desk, and spurs belonging to soldiers executed for serving as spies during the Civil War. You can only visit the house by guided tour (given hourly; the last tour at 3 pm), but before and afterward, until 4 pm, you can wander freely with a map through the formal garden full of roses and boxwoods, many of which are more than a century old. Admission to the garden grounds is free, but reserved tickets are required.