9 Sights in Frederick County, United States (with Map and Images)

Catoctin Mountain, along with the geologically associated Bull Run Mountains, forms the easternmost mountain ridge of the Blue Ridge Mountains, which are in turn a part of the Appalachian Mountains range. The ridge runs northeast–southwest for about 50 miles (80 km) departing from South Mountain near Emmitsburg, Maryland, and running south past Leesburg, Virginia, where it disappears into the Piedmont in a series of low-lying hills near New Baltimore, Virginia. The ridge forms the eastern rampart of the Loudoun and Middletown valleys.

Wikipedia: Catoctin Mountain (EN)

Sugarloaf Mountain is a small mountain and park about 10 miles (16 km) south of Frederick, Maryland. The closest village is Barnesville, located just over one mile from the foot of the mountain. The peak of this relatively low mountain is approximately 800 feet higher than the surrounding farmland. It is visible from many parts of northern Montgomery County and southern Frederick County, notably from I-270 north of the town of Germantown. Because of its geological and natural history interest, it was designated a National Natural Landmark in 1969. It is a notable example of an admission-free, privately owned scenic park.

Wikipedia: Sugarloaf Mountain (Maryland) (EN)

Washington Monument State Park is a public recreation area located approximately one mile (1.6 km) southeast of Boonsboro, Maryland. The park preserves the Washington Monument, a 40-foot-tall (12 m) tower honoring George Washington, the first President of the United States. The monument sits along the Appalachian Trail near the summit of South Mountain's Monument Knob. It was added to the National Register of Historic Places in 1972. The park is managed by the Maryland Department of Natural Resources.

Wikipedia: Washington Monument State Park (EN)

South Mountain is the northern extension of the Blue Ridge Mountain range into Maryland and Pennsylvania. From the Potomac River near Knoxville, Maryland in the south to Dillsburg, Pennsylvania in York County, Pennsylvania in the north, the 70-mile-long (110 km) range separates the Hagerstown and Cumberland valleys from the Piedmont regions of the two states.

Wikipedia: South Mountain (Maryland and Pennsylvania) (EN)

The Monocacy Aqueduct — or C&O Canal Aqueduct No. 2 — is the largest aqueduct on the Chesapeake and Ohio Canal, crossing the Monocacy River just before it empties into the Potomac River in Frederick County, Maryland, USA. The 438 foot aqueduct was built by three separate contractors between 1829 and 1833 at a cost of US$127,900.

Wikipedia: Monocacy Aqueduct (EN)

Begun in 1898 in rural Frederick County, Maryland, the LeGore Bridge was completed and opened to the public in 1900. It was built and maintained by the owners of the LeGore Lime Company, including local businessman James William LeGore and his company advisor, Eugene Hammond. It is 340 feet (100 m) in length, 27 feet (8.2 m) wide and 64 feet (20 m) high. The bridge is situated at 39°35'N 77°19'W. The five arch limestone bridge was restored in 1981 and 2009.

Wikipedia: LeGore Bridge (EN)

The 14th New Jersey monument is a memorial monument located on the Monocacy battlefield in Frederick, Maryland, United States. It stands to honor the men of the volunteer force that protected the Monocacy Junction during the crucial winter of 1863-1864. Their halting of Confederate troops from advancing Northward played a significant role in the Union territory control.

Wikipedia: 14th New Jersey Volunteer Infantry Monument (EN)

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.

Wikipedia: Bennies Hill Road Bridge (EN)

The Roddy Road Covered Bridge is a small, one lane king post wooden covered bridge near Thurmont, Frederick County, Maryland. It crosses Owen's Creek near Thurmont. It is 40 feet long, 16 feet wide, with a 12 foot-8 inch clearance. It was built between 1850 and 1860.

Wikipedia: Roddy Road Covered Bridge (EN)