Marriottsville, Maryland

The Henryton Tunnel, located near Henryton in southern Carroll County, Maryland, is the third-oldest tunnel in the world that remains in active railroad use. Constructed by the Baltimore and Ohio (B&O) Railroad and opened around 1850, it was the first tunnel constructed on the B&O's Old Main Line. In 1865 the tunnel was widened to accommodate double track. It was rebuilt into its current form in 1903. The tunnel has brick portals and lining. The coping and footings are concrete.: 452 

Henryton is an unincorporated community in Carroll County, Maryland, United States. It is located along the Patapsco River.

Ivy Hill is a historic home and farm and plantation located in Marriottsville, Howard County, Maryland. The property was part of General William Hammond Marriott's property. Marriott would later become Speaker of the Maryland House of Delegates in 1822. During the Civil War the farm was searched as the potential hiding place of 1st Maryland Infantry, CSA General Bradley Tyler Johnson, who was in the attic at the nearby Mt. Pleasant Farm.

Henryton State Hospital is a now-demolished hospital complex in Marriottsville, in southern Carroll County, Maryland, just across the Howard County line. The complex was located within Patapsco Valley State Park and along its southern end runs CSX's Old Main Line Subdivision and is very close to the Henryton Tunnel. The Henryton State Hospital center, or the Henryton Tuberculosis Sanatorium as it was called, was erected in 1922 by the Maryland Board of Mental Hygiene. It was established as a facility to treat African Americans suffering from tuberculosis. This was one of the first such facilities in Maryland erected to provide African Americans with the same level of treatment as white people. Other accounts state that this was more of containment Hospital rather than a treatment facility. They contend that Henryton was used more for the exile and quarantine of tuberculosis patients. The original complex opened in 1922 and consisted of six main buildings and one utility plant. These buildings were erected between the years of 1921 and 1923. The establishment of the Henryton Sanatorium was one of the final steps in Maryland's program to treat all of the state's tubercular patients. In the late twenties and early thirties the tuberculosis rate among African Americans in Maryland was quadruple the rate among whites. This placed a heavy burden on the hospital to deal with the increasing number of patients. In 1938 the hospital was budgeted $270,000 for the construction of new buildings to house 200 more patients. A refrigerated morgue was demanded after the hospital cremated and disposed of the remains of an African American child before the parents were contacted. The new buildings roughly doubled the size of the overall facility, and several more municipal buildings added even more space to the complex. However, by the time the new buildings were completed in 1946, the tuberculosis rates had dropped, leaving much more room than was necessary.

Forest View is a historic building located near Marriottsville, Howard County, Maryland, United States. The farm on which this house was built was a speculative venture that was begun 1860–1861, which was rare for that time period. In time production at the farm ended and the property was subdivided. Unlike many Howard County farms that suffered the same fate, the house was preserved. It is a 2½-story frame structure with a kitchen wing that extends out the back of the house. The original block was built in 1861, and additions have subsequently been added to the house including a second story over the kitchen wing. The Gothic Revival decorative features were added in the late 19th or early 20th century. The house's final form was realized about 1936. It was listed on the National Register of Historic Places in 2017.

Woodstock College was a Jesuit seminary that existed from 1869 to 1974. It was the oldest Jesuit seminary in the United States. The school was located in Woodstock, Maryland, west of Baltimore, from its establishment until 1969, when it moved to New York City, where it operated in cooperation with the Union Theological Seminary and the Jewish Theological Seminary. The school closed in 1974. It was survived by the Woodstock Theological Center, an independent, nonprofit Catholic research institute located at Georgetown University in Washington, D.C.

The Shipley House was located in Alpha, Howard County, Maryland, near Marriottsville. The house was among five other buildings supporting a farm in Alpha, Maryland. The 55-acre (22 ha) property was part of a 3,440-acre (1,390 ha) land grant named Woodford patented in 1727. John Taylor acquired the land and 2,707 acres (1,095 ha) of the estate were sold to Phillip Hammond in 1744. In 1777, Charles Hammond bequeathed 1,500 acres (610 ha) of Woodford and his slaves to his son. Nathan Shipley acquired a portion and through inheritance, Joshua H. Shipley acquired 77 acres (31 ha) of the Woodford estate, raising 12 children on-site. The slave plantation harvested tobacco and grain crops. The frame farm house was constructed in 1830. Outbuildings included a wellhouse (1900), a frame shed (1835), and a bank barn (1884). John and Mary O'Mara farmed and maintained the property as Sunnyside Farm, raising hoses and cattle until sale in 1979. The farm was purchased by Howard County in 1979 as possible expansion space for the controversial Alpha Ridge Landfill project. The county boarded up the properties without maintenance. In August 1992, the firm of Goodwin and Associates determined that the deterioration that occurred in twelve years of ownership by Howard County negated any effort to preserve the property. The land was converted to the Alpha Ridge Community Park in 1994, demolishing the Shipley House and outbuildings to replace them with a complex of revenue generating ball fields and facilities.

Henryton Heights is an unincorporated community in Howard County, Maryland, United States.

Woodstock is an unincorporated community which is a suburb of Baltimore, Maryland, United States. The original village of Woodstock is located in Howard County, and also includes portions of Baltimore County and Carroll County.

Waverly Mansion is a historic home located at Marriottsville in Howard County, Maryland, USA. It was built circa 1756, and is a 2+1⁄2-story Federal style stone house, covered with stucco, with a hyphen and addition that date to circa 1811. Also on the property are a small 1+1⁄2-story stone overseer's cottage and a 2-story frame-and-stone barn, and the ruins of a log slave quarter.Waverly was a property developed on land first patented by Charles Carroll of Carrollton and later part of the 1703 survey "Ranter's Ridge" owned by Captain Thomas Browne. The land was resurveyed in 1726 as "The Mistake." It was purchased by John Dorsey and deeded to his son and daughter-in-law, Nathan and Sophia Dorsey as the next owners.The property is associated with the Dorsey and Howard families. From the time it was established through the end of the Civil War, Waverly functioned as a plantation where unpaid slave labor was used for farm operations and creation of the wealth and lifestyle afforded to the Dorsey and Howard families. Through deeds, census records and an inventory taken upon the death of George Howard in 1846, information about the enslaved population at Waverly was uncovered. A 1965 article in the Ellicott City Times claimed that 999 slaves worked on the plantation at one time, but research has shown that between 7 and 25 enslaved men, women and children is more accurate. The Ellicott City Times article does not have any primary sources to back up this claim, nor is there an author's name credited to the article.

Alpha is an unincorporated community in Howard County, Maryland, United States. A postal office operated from 27 February 1884 to 15 June 1915.Alpha is the site of the Mt. View Cemetery. The town between Marriottsville, and Sykesville is not recognized by the name, but is dominated by the controversial Alpha Ridge Landfill. It was home to one of Howard County's earliest bicycle clubs active in 1891.

The Griggs House was a historic home located in Granite, Maryland. It was a two-story house constructed in the mid-19th century. The home is associated with the film, The Blair Witch Project. The house was a built in the style of Federal architecture, as a two-story stucco faced post and beam wood construction house on a stone foundation. It was two bays by three bays wide, and situated near the Smith/Sumwalt house and the Granite quarry which the town was renamed for. The house was visible on the 1877 Baltimore County Atlas. In 1984, the Department of Natural Resources conducted a historical survey of the Griggs property that resided on parkland of Patapsco Valley State Park. The property was not in use by this time and had interior details removed by vandals.In 1999, the house was used for the climactic ending of The Blair Witch Project. After filming, the State of Maryland announced it would demolish the historic home. As fans were visiting the abandoned house, its condition deteriorated. Funds were raised to save the building based on the success of the movie, and the State released press announcements that the property would be spared. However, the house was demolished soon afterwards without an announcement.