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

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)