Naval Air Station Patuxent River

Mattapany-Sewall Archeological Site is an archaeological site in St. Mary's County, Maryland. It is located at the Patuxent River Naval Air Station on a level terrace approximately 45' above sea level, less than 1000' south of the Patuxent River in an unused wooded/grassy tract. Documentary evidence identifies the site as Mattapany-Sewall, a manor established in 1663 and occupied from 1666 to 1684 by Charles Calvert, 3rd Baron Baltimore. It served as a governmental meeting place and colonial arsenal, and was the scene of the 1689 battle, known as the Protestant Revolution of 1689, in which Maryland's Proprietary government was overthrown.It was placed on the National Register of Historic Places in 1985.

The Patuxent River is a tributary of the Chesapeake Bay in the state of Maryland. There are three main river drainages for central Maryland: the Potomac River to the west passing through Washington, D.C., the Patapsco River to the northeast passing through Baltimore, and the Patuxent River between the two. The 908-square-mile (2,352 km2) Patuxent watershed had a rapidly growing population of 590,769 in 2000. It is the largest and longest river entirely within Maryland, and its watershed is the largest completely within the state.

Lexington Park is a census-designated place (CDP) in St. Mary's County, Maryland, United States, and the principal community of the Lexington Park, Maryland Micropolitan Statistical Area. The population was 11,626 at the 2010 census.

Drum Point is a census-designated place (CDP) in southern Calvert County, Maryland, United States, at the confluence of the Patuxent River with Chesapeake Bay. As of the 2010 census, the CDP had a population of 2,731. Prior to 2010 it was part of the Chesapeake Ranch Estates-Drum Point CDP.

Charlotte Hall Military Academy, located at Charlotte Hall, Maryland, was established as Charlotte Hall School in 1774 by Queen Charlotte to provide for the liberal and pious education of youth to better fit them for the discharge of their duties for the British Empire. It was fully accredited by the Maryland State Department of Education. The landed estate of the school embraced 360 acres (1.5 km2). The School was non-sectarian and of high moral tone. There were many illustrious graduates, persons of all major professions, clergy and congressmen. Trustees of the academy, formerly known as Charlotte Hall School, included Roger B. Taney (1777–1864) Supreme Court Justice, George Plater (1735–1792) Governor of Maryland, James Thomas (1785–1845) Governor of Maryland and Joseph Kent (1779–1837) Governor of Maryland.The School closed its doors in 1976 because of increasing financial problems. The property is now part of the Charlotte Hall Historic District. It is operated as the Charlotte Hall Veterans Home, a program of the Maryland State Department of Veterans Affairs.

The Chesapeake Biological Laboratory (CBL) is a marine science laboratory on the Chesapeake Bay in Solomons, Maryland, and it is the oldest state-supported marine laboratory on the East Coast of the U.S. It was founded in 1925 in a small waterman's shack by Dr. Reginald V. Truitt and is part of the University of Maryland Center for Environmental Science.As of 2013, CBL had 28 faculty members, 7 visiting PhD-level scientists, 22 students, 29 research technicians and 33 staff.; total employment by 2021 was 128, and the lab was the 20th largest employer in Calvert County The CBL campus includes 21 buildings, which include purpose built research facilities with running sea water and environmentally-controlled chambers. The Nutrient Analytical Services Laboratory is a key service lab that provides chemical analysis for samples from across the United States. The lab has other diverse instrumentation that allow its scientists to make measurements of biogeochemical constituents. One example is a stable isotope mass spectrometer, located in the Bernie Fowler Laboratory, which is named for a local politician, Bernie Fowler, who advocated for cleaning up Chesapeake Bay. Local research is supported by the research vessel RV Rachel Carson (2008), which is home ported at CBL.

St. Peter's Chapel is an historic Carpenter Gothic-style Episcopal church building located at 14590 Solomon's Island Road, South, in Solomons, Calvert County, Maryland. Built in 1889, it features the steep roof, lancet windows and board and batten siding typical of Carpenter Gothic churches. In 1900 it joined with Middleham Chapel to form Middleham and St. Peter's Episcopal Parish in the Episcopal Diocese of Maryland. St. Peter's Chapel is still in use today. The parish's current rector is the Rev. David Showers.

Our Lady Star of the Sea Catholic Church, built in 1927 in a mixed Art Deco and late Gothic Revival architectural style, is an historic Roman Catholic church located at 14400 Solomon's Island Road, South in Solomons, Calvert County, Maryland. Established in 1888, the parish is the oldest Catholic parish in Calvert County and its 1927 church building is the oldest Catholic church building in the county. It is part of the Roman Catholic Archdiocese of Washington. The Rev. Richard Gardiner served as pastor until 2011.

Solomons United Methodist Church is an historic United Methodist church building located at 14454 Solomon's Island Road, South, in Solomons, Calvert County, Maryland. Our current pastor is the Rev. Dottie Yunger.

J. C. Lore Oyster House, also known as J. C. Lore and Sons, Inc., Seafood Packing Plant, is located at 14430 Solomons Island Road South, in Solomons, Calvert County, Maryland. It is a large two story, rectangular frame industrial building constructed in 1934 as a seafood packing plant. It replaced a 1922 building that was destroyed by the 1933 Chesapeake Potomac hurricane. It is significant for its historical association with the commercial fisheries of Maryland's Patuxent River region, and architecturally as a substantially unaltered example of an early-20th century seafood packing plant. It has been adapted by the Calvert Marine Museum to house exhibits and many of its original spaces, artifacts, and records have been incorporated into them.It was listed on the National Register of Historic Places in 1984, and declared a National Historic Landmark in 2001.

The William B. Tennison is a Chesapeake Bay bugeye built in 1899 and converted to an oyster buy-boat in 1906–07. With the conversion her sail rig was removed and an engine inserted, and is the only surviving example of this conversion. Her construction marks a transition between log construction and plank construction. She is homeported at the Calvert Marine Museum in Solomons, Maryland. The Tennison is reputed to be the second oldest licensed passenger vessel in the United States.It was listed on the National Register of Historic Places in 1980, and as a National Historic Landmark in 1994.