Goose Creek (Potomac River tributary)

The National Conference Center (The National) is a corporate training facility in Leesburg, Virginia. It hosts over 14,000 individuals per month and comprises 265,000 square feet (24,600 m2) of meeting space. The center contains 250 conference rooms, an athletic facility, and 917 guest rooms. The building was built in 1974 as the Xerox Conference Center at a cost of $55 million. It was designed to assist in copier and technology training for company employees. It was designed by Vincent G. Kling & Partners, and is currently managed by NCC EE, LLC. In 1994 Xerox permitted outside organizations to use the grounds. The center was sold to Oxford Capital Partners in 2000. Two years later, the center completed a $29 million renovation, in order to ameliorate its training operations. The current design implements "living learning modules", a series of color-coded buildings, tunnels, a ballroom, and walking trails.

Broad Run is a tributary stream of the Potomac River in Montgomery County, Maryland. The headwaters of the stream originate west of the town of Poolesville, and the creek flows southward for 8.9 miles (14.3 km) to the Potomac River. The Broad Run and its watershed are almost entirely within the Montgomery County Agricultural Reserve.

The Nathan Dickerson Poole House is a historic home located at Poolesville, Montgomery County, Maryland. It is a 2+1⁄2-story, frame dwelling, constructed in 1871 and its design combines elements of the Victorian Gothic and Italianate styles. Also on the property are a frame barn and corn shed of early-20th-century date.It was listed on the National Register of Historic Places in 1983.

River Creek is a planned community in Loudoun County, Virginia, located 40 miles (64 km) west of Washington, D.C., and 4 miles (6 km) east of Leesburg at the confluence of the Potomac River and Goose Creek. It was the first gated country club community in the Washington, D.C. metropolitan area. River Creek is a joint venture project of the Tower Companies, Montgomery Development, and ClubCorp USA, Inc. River Creek welcomed its first residents in 1997.

Lansdowne is a census-designated place and planned community located near Leesburg, Virginia, United States. The population as of the 2010 United States Census was 11,253. It is north of State Route 7 and south of the Potomac River. Before the Revolutionary War, the Lee family established Coton Manor here. A section of the Potomac Heritage Trail runs through Lansdowne. It is the home of Inova Loudoun Hospital, the Jack Kent Cooke Foundation, Lansdowne Resort, Prison Fellowship, and Lansdowne Woods of Virginia, a gated, age-restricted community. Lansdowne is part of the Washington metropolitan area.

The Jack Kent Cooke Foundation is the largest scholarship provider in the United States. The private, independent foundation is dedicated to advancing the education of exceptionally promising students who have financial need. It offers the largest scholarships in the U.S., comprehensive counseling and other support services to students from 8th grade to graduate school. Since 2000 it has awarded over $175 million in scholarships to nearly 2,300 students and more than $97 million in grants to organizations that serve outstanding low-income students.

Mt. Nebo is a historic home located at Poolesville, Montgomery County, Maryland, United States. It is a large 2+1⁄2-story gable-roofed frame dwelling constructed in three periods: the main block, dating to the second quarter of the 19th century; a 1+1⁄2-story wing extends from the rear of the main block, which appears to have been an earlier dwelling from the late 18th century; and a two-story addition was made to the east gable end of the main block around the turn of the 20th century. Also on the property is a mid-19th-century log smokehouse and the remains of an early terraced "waterfall" garden. The property derives additional significance from its association with the White family through the latter half of the 19th century. Joseph White (1825–1903) was a locally prominent supporter of the Confederate cause during the American Civil War. Mt. Nebo was listed on the National Register of Historic Places in 1985.

The African American Burial Ground is a historic cemetery for the enslaved, located in Ashburn, Virginia, off Harry Byrd Highway (Virginia State Route 7) in Loudoun County, Virginia. Most of the enslaved buried there were from nearby Belmont Plantation. The abandoned site was rediscovered in 2015 by Rev. Michelle Thomas, in 2019 president of the local NAACP chapter. That year, Governor Ralph Northam appointed her to the Commission on African American History Education in the Commonwealth. In 2017 the real estate developer Toll Brothers, which owned the land, donated 2.75 acres (1.11 ha) to a new Loudoun Freedom Center. In 2021, it agreed to donate an additional 4 acres (1.6 ha), which will be used to re-create a schoolhouse and other structures used by enslaved people.There are also to be a columbarium and a scatter garden, where people can scatter ashes of their loved ones. In 2020 Michelle Thomas buried the first free Black in the cemetery: her 16-year-old son, dead of drowning.

Janelia Research Campus is a scientific research campus of the Howard Hughes Medical Institute that opened in October 2006. The campus is located in Loudoun County, Virginia, near the town of Ashburn. It is known for its scientific research and modern architecture. The current Executive Director of the laboratory is Ronald Vale, who is also a vice-president of HHMI. He succeeded Gerald M. Rubin in 2020. The campus was known as "Janelia Farm Research Campus" until 2014.

Janelia or Janelia Farm is a mansion and former farm near Ashburn, Virginia, built in 1936 for artist Vinton Liddell Pickens and her husband Robert Pickens, a journalist. The farm property has become the Janelia Research Campus of the Howard Hughes Medical Institute, which surrounds the house.

Belmont Manor House, formally known as Belmont Plantation, is a two-story, five-part Federal mansion in Loudoun County, Virginia, built between the years of 1799–1802 by Ludwell Lee (1760–1836), son of Richard Henry Lee. The land surrounding the mansion, the Belmont property, was handed down to his first wife (also his first cousin), Flora Lee, from their grandfather, Thomas Lee. Located in the Belmont census-designated place, the Belmont Manor House and property have been owned since 1995 by Toll Brothers, Inc. It uses the Manor House as the clubhouse in a gated golf community. The property and house are listed in the National Register of Historic Places.

Selden Island is a 408-acre island in the Potomac River, located about 32 km (20 mi) WNW of Washington, DC. It is about 4 km long and 0.4–0.5 km wide (2.5 x 1/4–1/3 miles). Although it is located within Montgomery County, Maryland, the only road access is via a bridge connecting it to the Loudoun County, Virginia side of the river. Archaeological evidence indicates the island has been a site of human activity since the Early Woodland period, around 1000 BCE. A characteristic type of pottery known as Selden Island ware dates from this period. It is also the site of a significant Late Woodland period settlement known as the Walker Prehistoric Village, which was added to the National Register of Historic Places in 1975.In 2002, following the diagnosis of two Loudoun County teenagers with malaria, mosquitoes from the island were found to carry the Plasmodium vivax malarial parasite.In 2004, Selden Island was purchased by the Howard Hughes Medical Institute as an addition to the Janelia Farm Research Campus. It was formerly leased as a sod farm.