Holy Trinity Greek Orthodox Church (Lowell, Massachusetts)

St. Patrick's Church is a historic Roman Catholic church at 284 Suffolk Street in Lowell, Massachusetts. Built in 1853 for a predominantly Irish congregation founded in 1831, it is one of the oldest Catholic parishes north of Boston in the United States. The building, a fine example of Gothic Revival architecture designed by the noted ecclesiastical architect Patrick C. Keely, was listed on the National Register of Historic Places in 1985.

Samuel Pollard Memorial Library or Pollard Memorial Library is the main branch of the public library in Lowell, Massachusetts.

The Whistler House Museum of Art is the birthplace of painter and etcher James McNeill Whistler. It is located at 243 Worthen Street, Lowell, Massachusetts, USA, and is open as a museum displaying works from the museum collection and shows by artist members.

The Lowell Power Canal System is the largest power canal system in the United States, at 5.6 miles in length. It is operating through six major canals on two levels, controlled by numerous gates. The system was begun in the 1790s, beginning its life as a transportation canal called the Pawtucket Canal, which was constructed to get logs from New Hampshire down the Merrimack River to shipbuilding centers at Newburyport, Massachusetts, bypassing the 30-plus-foot drop of the Pawtucket Falls. In the early 1820s, Associates of the recently deceased Francis Cabot Lowell bought up the old Pawtucket Canal in what was then East Chelmsford, Massachusetts. Within a few years, the new industrial center that became Lowell was using canals feeding off a widened and deepened Pawtucket Canal as a direct power source for their textile mills. The first of these canals was the Merrimack Canal, which powered the Merrimack Manufacturing Company. The repurposing of the Proprietors of Locks and Canals allowed the Associates to sell water power to other companies, starting with the Hamilton Canal, leading to the explosive growth of the town, and then shortly thereafter, city, of Lowell. By the late 1840s, Lowell's canal system was producing as much power as possible. However, the Chief Engineer of Locks and Canals, an Englishman by the name of James B. Francis devised the Northern Canal and the Moody Street Feeder, to increase the capacity of, and availability of water to various parts of, the whole system. The Pawtucket Gatehouse was constructed to control flow from behind the Pawtucket Dam into the Northern Canal. The dam itself, which was built twenty years earlier, was lengthened at that time, diverting the entire Merrimack (during periods of lower flow) into the two canal system entrances above it. It is a stone dam topped with wooden flashboards – a system still used on this dam today. The level of the water is regulated by the flashboards and the metal pins that hold them back. When there is too much water going over the top of the dam, the pins bend backwards, releasing the boards, and the outflow of the dam is increased. The Gatehouse contains ten wooden gates that control the flow of the Merrimack into the canal. Originally, they were opened by a Francis Turbine, also an invention of James B. Francis. Today, the Gatehouse is controlled electrically and remotely by Boott Hydroelectric, who is partially a continuation of the Proprietors of Locks and Canals, and who operates a 24-megawatt hydroplant on the Northern Canal. The Canal System and the Gatehouse were designated a Historic Civil Engineering Landmark by the ASCE in 1984 and a Historic Mechanical Engineering Landmark by the ASME in 1985 and are part of Lowell National Historical Park. It was added to the National Register of Historic Places in 1976, and declared a National Historic Landmark the next year.

The Merrimack Canal is a power canal in Lowell, Massachusetts. The canal, dug in the 1820s, begins at the Pawtucket Canal just above Swamp Locks, and empties into the Merrimack River near the Boott Cotton Mills. The Merrimack Canal was the first major canal to be dug at Lowell exclusively for power purposes, and delivered 32 feet (9.8 m) of hydraulic head to the mills of the Merrimack Manufacturing Company. The Merrimack Manufacturing Company was the first of the major textile mills constructed in Lowell. It was demolished around 1960. The canal, which runs along the southeast side of Dutton Street and then between the two halves of Lowell High School, is unique in the Lowell Canal System as it delivers the full 32-foot (9.8 m) drop of the Merrimack at once, instead of operating on a 13-foot (4.0 m) and a 17-foot (5.2 m) two-level system.

The American Textile History Museum (ATHM), located in Lowell, Massachusetts, was founded as the Merrimack Valley Textile Museum (MVTM) in North Andover, Massachusetts in 1960 by Caroline Stevens Rogers. ATHM told America’s story through the art, science, and history of textiles. In June 2016, the museum closed.The bulk of the library and archives as well as many fabric samples were acquired by Cornell University.

The City Hall Historic District is a historic district in Lowell, Massachusetts, United States, bound roughly by Broadway, Colburn, and Kirk streets. The centerpiece of the district is the Richardsonian Romanesque City Hall, built in 1893 to a design by Merrill & Cutler, with its 180-foot (55 m) clock tower.The district features Greek Revival and Romanesque Revival architecture, including work by Kirk Boott. City Hall Historic District was added to the National Register of Historic Places in 1975, and expanded in 1988.

The Wannalancit Mills (formerly the Suffolk Mills) in Lowell, Massachusetts is an early American cotton mill, parts of which date to the 1830s at the earliest. Its namesake is a corruption of Wonalancet, a sachem or sagamore of the Penacook Native American tribe. Today the complex is home to office space, conference center, and university research facilities.

The National Streetcar Museum is a streetcar museum and heritage railway located in Lowell, Massachusetts. It is owned by the New England Electric Railway Historical Society, which also operates the Seashore Trolley Museum, and is operated as part of the National Park Service's Lowell National Historical Park.

Saint Joseph's Roman Catholic College for Boys, also known as Saint Joseph's High School, is a historic school building at 760 Merrimack Street in Lowell, Massachusetts. The three story brick Romanesque Revival building was built in 1892 to a design by Irish-American church architect Patrick W. Ford. The school was one of a number of Roman Catholic institutions built to serve Lowell's burgeoning French-American community, a significant portion of which had settled in "The Acre", as the neighborhood is known. In 1991 the school was merged with other local Catholic schools to form the Lowell Catholic High School. The diocese sold the building in 1997 to a local nonprofit, which converted it to residential use.The building was listed on the National Register of Historic Places in 2010.

Lowell Heritage State Park is a public recreation area and historical preserve located in Lowell, Massachusetts, that protects and promotes the city's seminal role in the American Industrial Revolution. The state park was established in 1974 as a precursor to Lowell National Historical Park, which was created in 1978. Aside from the functions the national park also serves, the state park maintains additional sites around the city such as the Sampas Pavilion.

The New England Quilt Museum, founded in 1987, is located in downtown Lowell, Massachusetts and is the only institute in the Northeastern United States solely dedicated to the art and craft of quilting. It is the second-oldest quilt museum in the United States. It houses special and permanent exhibits, a library, a museum shop, and classrooms. Collections are strong in 19th century quilts, with a geographic focus on New England.