Lawyers Hill Historic District

The Belmont Estate, now Belmont Manor and Historic Park, is a former plantation located at Elkridge, Howard County, Maryland, United States. Founded in the 1730s and known in the Colonial period as "Moore's Morning Choice", it was one of the earliest forced-labor farms in Howard County, Maryland. Its 1738 plantation house is one of the finest examples of Colonial Georgian architectural style in Maryland.From the late 17th century until 1962, the property was privately owned and associated with important personages from the late 17th century to the 20th century, including Dr. Mordecai Moore, Caleb Dorsey, Alexander Contee Hanson, and David K. E. Bruce.The property was then successively owned and maintained as the Belmont Conference Center, by the Smithsonian Institution, the American Chemical Society, and Howard Community College. It is now the 68-acre Belmont Manor and Historic Park, owned by Howard County and its Department of Recreation and Parks. It adjoins Patapsco Valley State Park. Facilities on the estate include the Belmont Manor House, a carriage house, a cottage, a large barn, formal gardens, a pond, and an aqua garden.It is listed on the Maryland Historic Trust (MHT), Inventory of Historic Properties (MIHP), and is on the National Register of Historic Places (NRHP) as part of the Lawyers Hill Historic District, Elkridge, Maryland.

The Lawn, is a historic home located at Elkridge, Howard County, Maryland, USA. It is a 19th-century frame house built in 1835 with five outbuildings, three of which (two cottages and a barn) date from the 19th century. The house was owned by George Washington Dobbin, who built the home originally as a summer retreat. The Rouse Company commercial corridor and road is named after Dobbin.It was listed on the National Register of Historic Places in 1984.In 2006, The Lawn was purchased after it had been apartments for many years. Many improvements were made, such as the library room floors being raised and refinished. In 2006, The Lawn was the Howard County Decorator Show house; professional decorators came in and refinished, furnished and decorated several rooms. Both the main kitchen and the butler pantry received renovations including new cabinets and appliances. The house was restored to its original glory.

The Hockley Forge and Mill are a collection of colonial-era industrial buildings along the Patapsco River near modern Elkridge, Maryland. Located at the river's head of navigation, the site is a flat section of land along the Patapsco River valley with steep embankments on either side. At its 19th-century peak, the site held more than 30 industrial buildings. Initially, the site was the Patapsco crossing of the "Old Indian Road" surveyed by Oliver Cromwell in 1734. In 1760, the forge site was surveyed by Edward Norwood; the forge itself was founded June 14 by Charles Carroll of Carrollton as the "Baltimore Company. Other partners included Charles Carroll of Duddington, Daniel and Walter Dulany, Charles Carroll (barrister) and Benjamin Tasker, Sr. who also operated two other forges. Operated by slaves, the forge produced goods to replace ones imported from England.When the old Baltimore forge burned down in April 1772, slaves were sent to work at the Hockley Forge.In 1781, the state of Maryland seized the company once owned in part by two Dulany cousins who were loyal to the British. Dan Dulany of Baltimore owned a remaining interest in the forge, and wrote the state to reimburse him for the loss in value due to losses sustained by loyalists in the colonial war. He cited that at the time, the forge property contained 100 acres and was operated by 98 slaves valued at 40 pounds each.Forge work depended on a declining supply of coal and wood which idled the plant in 1783. In 1794, Christopher Johnston purchased the property and sold the equipment from the slitting mill to George Elliott for his upstream mill in 1807. The property was auctioned on September 16, 1819, renovated by the Carroll and Oliver families and resold in 1822. A large distillery operation was put into operation by John McKim Jr. which ceased by 1833 when the Thomas Viaduct construction began. The mill continued in operation by George T Worthington until a fire in 1856. In 1868, a major flood damaged the four-story mill. The Levering family acquired the site and sold it in 1876 to the Viaduct Manufacturing Company. A street through the site is now named Levering Avenue. From 1906-1910, a 20-by-30-foot room was rented to Marion B. Davis, who manufactured brass screw threads and socket assemblies for automobiles delivered by horse and carriage. The Viaduct Company produced telegraph equipment onsite until it was abandoned in 1914. Since 1914, most of the remaining buildings have been demolished or destroyed by fire or flood.

The Thomas Viaduct spans the Patapsco River and Patapsco Valley between Relay, Maryland and Elkridge, Maryland, USA. It was commissioned by the Baltimore and Ohio Railroad (B&O); built between July 4, 1833, and July 4, 1835; and named for Philip E. Thomas, the company's first president. Some claim it to be the world's oldest multiple arched stone railroad bridge. However, the Sankey Viaduct on the Liverpool and Manchester Railway was opened in 1830, and finally completed in 1833. At its completion, the Thomas Viaduct was the largest railroad bridge in the United States and the country's first multi-span masonry railroad bridge to be built on a curve. In 1964, it was designated as a National Historic Landmark. In 2010, the bridge was designated as a National Historic Civil Engineering Landmark by the American Society of Civil Engineers. The viaduct is now owned and operated by CSX Transportation and still in use today, making it one of the oldest railroad bridges still in service.

Relay, Maryland, or Relay House, Maryland, was formerly an important junction and rail stop on the Baltimore and Ohio Railroad, located 9 miles (14 km) west of Baltimore, Maryland. It was the busiest station on the line except for Baltimore itself. A town grew up around it: a general store, a school, and a volunteer fire company. Although the neighborhood is still inhabited, only the ghost of the town survives. There is no longer town government, a post office, nor are there any stores. The former fire house, at 1710 Arlington Avenue, at one point the town hall, has survived and is available for rental for events. In 2021 Relay is a historic district of Halethorpe, Maryland, near the intersection of today's Viaduct and Railroad Avenues. There is a Relay Elementary School.

Elkridge is an unincorporated community and census-designated place (CDP) in Howard County, Maryland, United States. The population was 15,593 at the 2010 census. Founded early in the 18th century, Elkridge is adjacent to two other counties, Anne Arundel and Baltimore.

First Baptist Church of Elkridge, is a historic African American Church located at 5795 Paradise Ave in Elkridge, Maryland. The building was constructed in 1877.

Orange Grove was a town straddling the Patapsco river in Howard County and Baltimore County Maryland, United States The Orange Grove area was the site of two parallel roads running along the Patapsco river settled by the Elliotts in 1762. The road to then North was referred to as "George Washington's Gun Road" as the path of General Lafayette's troops en route to the battle of Yorktown. In 1856, the land was sold by George Elliot for $9,000 to George Worthington and George Baily. They started a construction of a six story mill and sold the property to C.A Gambrill for $45,000. The Gamrill Mill was renamed to Orange Grove producing "Patpasco Superlative Patent" and "Orange Grove" flour. Citizens lived on the Howard County side, using a rope bridge to travel to the mill and B&O railroad siding. In 1869, the mill was purchased by R.G. and P.H. MacGill keeping the name C.A. Gambill & Company, who added steam power in 1873 and modern rollers in 1879. In 1898, the Orange Grove school opened. In 1904, ice stacked up, tearing down the bridge. The same year, the company owned Phoenix mill burned in the great Baltimore fire. On 6 May 1905, the mill and train station burned in a fire started in the engine room monitored by George W. Carr. The town did not recover, and the ruins are part of the Patapsco State Park with a modern suspended bridge along the trail.

St. Denis station is a passenger rail station on the MARC Camden Line in the Maryland town of the same name. While the small station is the line's closest station to its terminus at Camden Yards in Baltimore, it has low ridership. St. Denis station contains two platforms and three tracks. The southbound platform, located on the corner of Arlington and Maple Avenues, has a shelter that is made of plexiglas and aluminum. MARC gives this platform as the official address of the station. The northbound platform contains a wooden shelter on an embankment at the end of East Street with the name of the station on the back of it. The station also contains two at-grade wooden pedestrian crossings, one which spans the entire right-of-way from Arlington Avenue to East Street, and the other which only runs from the southbound platform on Maple Avenue to the middle tracks. East of St. Denis, the Camden Line crosses over the MARC Penn Line south of the Halethorpe MARC station. The station itself, is an excellent spot for railfanning due to its proximity to Baltimore and its location at a point that sees Capital Subdivision, Baltimore Terminal Subdivision, and Old Main Line Subdivision freight traffic. A junction leading to the B&O Railroad Museum also exists between here and the terminus at Camden Yards.

The Patapsco Swinging Bridge is located in the Avalon/Orange Grove area of Patapsco Valley State Park in central Maryland, United States. It is a suspension bridge consisting of a wooden deck supported by large cables. The Patapsco Valley has a history of "swinging" bridges built for pedestrian travel from one side of the river to the other. The Orange Grove Flour Mill was one such popular crossing and is where the current bridge now stands. The first bridge was built by the Orange Grove Flour Mill for employees to cross the river. The new swinging bridge, built by the Maryland Department of Natural Resources, is one of the most well known and most popular attractions at the Patapsco Valley State Park.

The Orange Grove Flour Mill was a flour mill established in 1856. It was one of the leading flour mills in the Mid-Atlantic states until it was destroyed in a fire in 1905.

Hanover is an unincorporated community in the Baltimore/Annapolis area in northwestern Anne Arundel County and eastern Howard County in the U.S. state of Maryland, located south of Baltimore. The community is located approximately at the intersection of Maryland State Highway 100 and the Baltimore–Washington Parkway. It is part of the Baltimore-Washington Metropolitan Combined Statistical Area and is located just southwest of the Baltimore-Washington International Thurgood Marshall Airport (commonly known as "BWI"). It is bordered by Severn to the south, Linthicum to the east, and Elkridge to the north and west.