Lewis Mill Complex

The Poffenberger Road Bridge, near Jefferson, Maryland, is a wrought iron bridge by the Wrought Iron Bridge Company of Canton, Ohio. The bridge is similar to the Fourpoints Bridge elsewhere in Frederick County. The bridge is a single-span double-intersection Pratt truss. It was built circa 1878 and remains in daily use.It was listed on the National Register of Historic Places in 1978.

The George Willard House, also known as New Freedom Spring, is a Federal style house with Greek Revival details near Jefferson, Maryland. Built about 1818 for farmer and tanner George Willard, the house was altered by Willard's son after 1845 with Greek Revival remodeling.The George Willard House was listed on the National Register of Historic Places in 1993.

Jefferson is an unincorporated community and census-designated place (CDP) in Frederick County, Maryland, United States. As of the 2020 census the town had a population of 2,235 (which includes the widespread area of the town's zip code, not Jefferson proper). Jefferson was established in 1774 and incorporated as a town in 1831. However, a year later, in 1832, the citizens of the town decided that municipal government was unnecessary, and dis-incorporated the town, which has been unincorporated since then.

Bennies Hill Road Bridge is an iron bowstring arch bridge over Catoctin Creek near Middletown, Maryland, United States. It is one of two remaining bridges of its type in Maryland that remain in their original locations. The bridge was restored in 2009.

Shafer's Mill is a house near Middletown, Maryland, built in the early 19th century. The Federal style house was built for John Shafer, Jr., and was occupied after his death by his son, Peter. The Shafers operated four mills in the Middletown area. The house, however, was never operated as a mill.

Broad Run is an unincorporated community in Frederick County, Maryland, United States. Broad Run is located on Maryland Route 383, 4.5 miles (7.2 km) southeast of Middletown.

On May 20, 1958 a Vickers Viscount airliner operating Capital Airlines Flight 300 was involved in a mid-air collision with a United States Air Force T-33 jet trainer on a proficiency flight in the skies above Brunswick, Maryland. All 11 people on board the Viscount and one of the two crew in the T-33 were killed in the accident. Flight 300 was the second of four fatal crashes in under two years involving Capital Airlines Viscounts; the others were Flight 67 (April 1958), Flight 75 (May 1959), and Flight 20 (January 1960). An investigation of the accident concluded that the pilot in command of the T-33 failed to see and maintain a safe distance from other air traffic.

Petersville is an unincorporated community in Frederick County, Maryland, United States. Petersville is located at the junction of Maryland routes 79 and 180, 1.3 miles (2.1 km) northeast of Rosemont.

Catoctin Creek is a 27.9-mile-long (44.9 km) tributary of the Potomac River in Frederick County, Maryland, USA. Its source is formed north of Myersville. In Myersville, it merges with the Little Catoctin Creek at Doub's Meadow Park. From there, it flows directly south through Middletown, and the southern Middletown Valley for the entire length of the stream collecting several smaller tributaries. It makes a crossing with the Chesapeake and Ohio Canal at the Catoctin Aqueduct, one of just 11 of these structures to survive. Catoctin Creek enters the Potomac River east of Brunswick.

Middletown Valley, also historically known as Catoctin Valley, is a valley in western Frederick County in the state of Maryland.

The Henry Smeltzer Farmstead is a historic home and farm complex located near Middletown, Frederick County, Maryland, United States. It includes a two-story six-bay brick farmhouse dating to about 1832, a frame bank barn ruin, and several rusticated concrete block silos. A concrete block slaughter house, weighing house well house and holding pens complete the complex, which was associated in the early and mid-twentieth century with Main's Meats in Middletown. The house is built into the hillside as a "bank house", with its cellar above grade on the south side. The front and rear elevations feature porches across their widths.The Henry Smeltzer Farmstead was listed on the National Register of Historic Places in 2010.

Rich Mountain is a historic home and farm complex located at Frederick, Frederick County, Maryland, United States. It is on the remaining 10-acre (40,000 m2) tract from the original farm. The complex consists of a stone dwelling dating from 1810 to 1820 with a one-story kitchen wing; a 19th-century frame Pennsylvania barn; and a hog barn, wagon shed / corn crib, equipment shed, and chicken coop. The house combines Federal style elements with regional vernacular features.Rich Mountain was listed on the National Register of Historic Places in 2005.