McComas Institute

Joppatowne is a census-designated place in southwestern Harford County, Maryland, United States. Serving as a bedroom community for nearby Baltimore, it was established in 1961 as a planned unit development (PUD). The population was 12,616 at the 2010 census, up from 11,391 in 2000. Joppatowne is covered by the "Joppa" ZIP Code of 21085, and "Joppa" is a designated planning region for Harford County. The Joppa ZIP code (21085) extends 6 miles (10 km) north of Joppatowne, as far as Benson, just south of Bel Air. The namesake of both Joppatowne and Joppa is the original town of "Joppa" (Jaffa, Israel). It was a major seaport in American colonial times and the county seat of the original Baltimore County until 1768. Its site is located within the boundaries of present-day Joppatowne.

Olney, originally patented as Prospect, is a historic home and farm complex located at Joppa, Harford County, Maryland. It is a 264-acre (1.07 km2) working pony farm with a collection of 15 structures ranging in style, use, and elegance. The main building on the property is a 2+1⁄2-story brick house dating to 1810, generally called "the mansion." The house was evolved into a museum of Maryland architecture, with salvaged features from demolished buildings in Baltimore and Philadelphia. These include paneling from the Isaac Van Bibber house in Fells Point, Baltimore dating to 1815; the marble Ionic portico from William Small's Baltimore Athenaeum from 1830; and a marble bas-relief plaque designed by Pierre L'Enfant for Robert Morris's great 1795 house in Philadelphia. Also on the property is an early-18th-century, 2+1⁄2-story stone dwelling and a variety of still-functioning farm structures that in themselves range in style from simple stone stables and frame hay barns to an unusual two-story brick blacksmith's shop. In addition, the 1914 Union Chapel School, was moved onto the property in 1980 and re-outfitted as St. Alban's Anglican Church. The property was developed by J. Alexis Shriver (1872–1951), a man prominent in local and state historical and agricultural matters who lived at Olney from 1890 until his death.It was listed on the National Register of Historic Places in 1987.

Clayton is an unincorporated community in Harford County, Maryland, United States. Clayton is located on Maryland Route 152, 4 miles (6.4 km) northwest of Edgewood.

Norris-Stirling House, also known as Mt. Pleasant, is a historic home located at Bel Air, Harford County, Maryland. It is composed of an early 19th-century fieldstone section and two later frame additions. In 1936, a lean-to addition and double-tiered porch were added. The property also includes a large frame bank barn and corncrib, a stone springhouse, and a garage.It was listed on the National Register of Historic Places in 1979.

Harford Glen Environmental Education Center is a division of Harford County Public Schools and is involved in environmental and elementary education. The park, which is open to the public during the summer and on weekends is located on Winters Run. Harford Glen was also the host of the 13th annual Maryland Envirothon state level event in 2002.

The Jericho Covered Bridge is a Burr arch through truss wooden covered bridge near Jerusalem, Harford County and Kingsville, Baltimore County, in Maryland, United States and near historic Jerusalem Mill Village. The bridge was constructed in 1865 across the Little Gunpowder Falls. This bridge is 88 feet (27 m) long and 14.7 feet (4.5 m) wide and is open to traffic.The Jericho Covered Bridge was listed on the National Register of Historic Places in 1978.There are also rumors the bridge is 'haunted' by the ghosts of civil war soldiers. The bridge is believed to be a site where former Civil War soldiers committed suicide.

Whitaker's Mill Historic District is a national historic district near Joppa, Harford County, Maryland, United States. It includes three early- to mid-19th-century buildings: the 2+1⁄2-story rubble stone Whitaker's Mill built in 1851, the 1+1⁄2-story rubble stone miller's house, and the log-and-frame Magness House, begun about 1800 as the miller's house for the first mill on the site. The district also includes an iron truss bridge known as Harford County Bridge No. 51, constructed in 1878, and the oldest such span in the county. The grist mill closed operations about 1900.It was added to the National Register of Historic Places in 1990.

Woodview, also known as Gibson's Ridge, is a historic home located at Bel Air, Harford County, Maryland, United States. It is a two-section, 2+1⁄2-story Federal style stone house. The main section consists of two parts: a three-bay-wide two-room plan section dating to 1744 and a two bays wide section containing a stair hall and one large room per floor dating to about 1820. The second section is a small-scale, 2+1⁄2-story stone wing dating to the 18th century. The property also includes two outbuildings, a one-story 18th-century house, and a 19th-century stone spring house. Smells of wood smoke. Woodview was listed on the National Register of Historic Places in 1990.

Jerusalem is an unincorporated community in Harford County, Maryland, United States. It is the location of the historic Jerusalem Mill Village and Jericho Covered Bridge, both listed on the National Register of Historic Places. Jerusalem Mill Village is located on Jerusalem Road in Kingsville, MD between the Little Gunpowder Falls river and Jericho Road.

Jericho Farm is a historic home located near Kingsville, Baltimore County, Maryland, United States near historic Jerusalem Mill Village. It is a large 2+1⁄2-story gable-roofed stone dwelling overlooking the Little Gunpowder Falls. The house was constructed in two periods: the original dwelling, built about 1780, was a 2+1⁄2-story, side-passage, double pile house; about 1820, a five-bay, 2+1⁄2-story, center-passage, single pile house was constructed against the south gable of the earlier building.Jericho Farm was listed on the National Register of Historic Places in 1984.

Jerusalem Mill Village is a living history museum that spans the 18th through early 20th centuries. One of the oldest and most intact mill villages in the U.S. state of Maryland, Jerusalem is located in Harford County, along the Little Gunpowder Falls River. It also serves as the headquarters of the Gunpowder Falls State Park. The site was added to the National Register of Historic Places on August 20, 1987. Also on the National Register of Historic Places and located nearby are Jericho Farm and the Jericho Covered Bridge.

Trinity Lutheran Christian School & Early Learning Center (TLCS) is a private K-8 Christian school in the Joppa community and in the Edgewood census-designated place in Harford County, Maryland.Trinity serves families with children ages 6 weeks to 8th Grade.