The One-Million-Liter Test Sphere—also known as the Test Sphere, the Horton Test Sphere, the Cloud Study Chamber, Building 527, and the “Eight Ball” —is a decommissioned biological warfare (BW) chamber and testing facility located on Fort Detrick, Maryland, USA. It was constructed and utilized by the U.S. Army Biological Warfare Laboratories as part of its BW research program from 1951 to 1969. It is the largest aerobiology chamber ever constructed and was placed on the National Register of Historic Places in 1977.
Point of Rocks is a historic passenger rail station on the MARC Brunswick Line between Washington, D.C., and Martinsburg, WV, located at Point of Rocks, Frederick County, Maryland, United States. The station was built by the Baltimore and Ohio Railroad in 1873, and designed by E. Francis Baldwin. It is situated at the junction of the B&O Old Main Line and the Metropolitan Branch. The Met Branch also opened in 1873 and became the principal route for passenger trains between Baltimore, Washington and points west.
The Banneker-Douglass Museum, formerly known as Mt. Moriah African Methodist Episcopal Church, is a historic church at Annapolis, Anne Arundel County, Maryland. It was constructed in 1875 and remodeled in 1896. It is a 2+1⁄2-story, gable-front brick church executed in the Gothic Revival style. It served as the meeting hall for the First African Methodist Episcopal Church, originally formed in the 1790s, for nearly 100 years. It was leased to the Maryland Commission on African-American History and Culture, becoming the state's official museum for African-American history and culture. In 1984, a 2+1⁄2-story addition was added when the building opened as the Banneker-Douglass Museum.
The Poffenberger Road Bridge, near Jefferson, Maryland, is a wrought iron bridge by the Wrought Iron Bridge Company of Canton, Ohio. The bridge is similar to the Fourpoints Bridge elsewhere in Frederick County. The bridge is a single-span double-intersection Pratt truss. It was built circa 1878 and remains in daily use.
The Burkittsville Historic District comprises the small town of Burkittsville, Maryland. Located at a crossroads in western Frederick County, the town is a consistent collection of early 19th-century Federal style houses mixed with a few Victorian style houses that has remained virtually unchanged since 1900. The town is surrounded on three sides by an open, farmed landscape, and nestles against South Mountain on its western side.
The Stonebraker and Harbaugh–Shafer Building in Middletown, Maryland was built circa 1830 with a residential section to the east and a commercial section to the west. The Federal style building incorporates Greek Revival detailing in the interior.
The Pearre-Metcalfe House is a historic home located at New Windsor, Frederick County, Maryland, United States. It is a brick Greek Revival style farmhouse, built about 1859. There is a small, brick springhouse with corbeled brick cornice and tin roof on the property.
The Daniel Sheffer Farm is a historic home and farm complex located at Middletown, Frederick County, Maryland, United States. It is dominated by the two story brick main house, which was constructed between 1840 and 1850. Outbuildings include a stone spring house, a large wood-frame barn, constructed about 1900, and several wood-frame outbuildings including a corncrib, a wagon shed, three frame wood sheds, two tractor sheds, and a chicken house. A concrete block milk house and terra cotta silo were added to the complex in the 1930s. In September 1862, the property served as a temporary hospital for wounded soldiers during the Battle of South Mountain in the American Civil War.
The George Markell Farmstead, also known as Arcadian Dairy Farm and the Thomas Property, is a historic home and farm complex located at Frederick, Frederick County, Maryland, United States. It consists of brick house built about 1865, a brick smokehouse, a bake oven, two stone domestic outbuildings, an ice house, a springhouse, a frame stable, a frame chicken house, a mid-20th century guest house, and various sheds and outbuildings. Nearby is a large gambrel-roofed concrete block barn. The main house has combined Greek Revival and Italianate stylistic influences. The once large Markell dairy farm, with its lane to the Ballenger Creek ford of the Monocacy River, served as the primary approach route to the battlefield by Confederate troops during the July 9, 1864 Battle of Monocacy during the American Civil War.
The Abraham Jones House is a historic home located at Libertytown, Frederick County, Maryland, United States. It is a 2+1⁄2-story, Flemish bond brick house attached to a later frame structure. Roof features include low "parapets" formed by the extension of the gable walls and at each end of the roof ridge are single flush gable chimneys. The main entrance door is an example of Federal period craftsmanship and design. It is one of the finest Federal houses in Maryland.
The Victor Cullen Center, Old Administration Building is a historic building located at Sabillasville, Frederick County, Maryland, United States. It is a 2+1⁄2-story, stone and frame Colonial Revival style structure located on a hillside with four stone chimneys, two on each gable end. The building was built originally to house the Maryland Tuberculosis Sanitorium, the first state sponsored institution of its type in Maryland. It was designed by the architectural firm Wyatt & Nolting.
The Victor Cullen School Power House is a historic power house building located at Sabillasville, Frederick County, Maryland. It is a 2+1⁄2-story, Renaissance Revival stone structure, with a hip roof and a fully exposed basement. The building was built originally as part of the Maryland Tuberculosis Sanitorium, the first state sponsored institution of its type in Maryland. It was designed by architects Wyatt & Nolting.
The Woodsboro and Frederick Turnpike Company Tollhouse is a historic toll house located at Walkersville, Frederick County, Maryland, United States. It is a two-story brick structure over a stone foundation, with a small interior end chimney at each gable end. It was used as a tollhouse by the Woodsboro and Frederick Turnpike Company.
The Roddy Road Covered Bridge is a small, one lane king post wooden covered bridge near Thurmont, Frederick County, Maryland. It crosses Owen's Creek near Thurmont. It is 40 feet long, 16 feet wide, with a 12 foot-8 inch clearance. It was built between 1850 and 1860.
The Emmitsburg Historic District is a national historic district in Emmitsburg, Frederick County, Maryland. The district is predominantly residential and includes most of the older area of the town extending along Main Street and Seton Avenue. Also included are several commercial buildings and churches interspersed among the dwellings. The buildings are primarily two-story sided log or brick, dating from the late 18th to the mid 19th centuries. Some later 19th century buildings in this area include some large Italianate-influenced buildings forming the northeast and southeast corners of the main square; an area destroyed by fire in 1863. Settlement began in the region during the 1730s, bringing Protestant Germans and Scotch-Irish from Pennsylvania, as well as English Catholics from Tidewater Maryland.
The New Market Historic District is a national historic district in New Market, Frederick County, Maryland. The district encompasses the town located along what was originally the National Pike. About 90 percent of the buildings in the historic district date from the 19th century and include Federal-style buildings and Greek Revival buildings, with a number of Victorian buildings, a larger example being the Ramsburg House.
The Mount Airy Historic District is a national historic district in Mount Airy, located in Carroll and Frederick County, Maryland. The district comprises a cohesive group of commercial, residential, and ecclesiastical buildings dating from the late 19th through early 20th centuries. The brick Baltimore and Ohio Railroad station, designed by E. Francis Baldwin and constructed in 1882, represents the town's origin as an early transportation center for the region, which dates back as early as 1838. A group of early-20th century commercial structures represent the rebuilding of Mount Airy's downtown after a series of fires between 1903 and 1926. The residential areas are characterized by houses illustrating vernacular forms and popular stylistic influences of the late 19th and early 20th century. Three churches are located within the district.
Creagerstown is an unincorporated community in Frederick County, Maryland, United States. It is playfully known by its residents as "4 miles from everywhere" because of its situation at 4 miles (6.4 km) from Thurmont, Woodsboro, Rocky Ridge, and Lewistown.
Elf is a racing yacht built in 1888 by George Lawley & Son of South Boston, Massachusetts, for William H. Wilkinson. She was designed by George F. Lawley and is the oldest small yacht in the United States. She is located at the Chesapeake Bay Maritime Museum in St. Michaels, MD.Talbot County, Maryland.
Oakdale is a historic plantation located in Daisy, (Woodbine) Howard County, Maryland, former home of Maryland Governor Edwin Warfield.
