Classified for credit

Air Force airlift history museum at Dover AFB with aircraft spanning WWII to present — military history and aerospace technology.

First American powder mill site along the Brandywine, founded by E.I. du Pont — covers early American industrial chemistry, gunpowder production, and the du Pont family legacy.

Civil War-era island fort used as a Union prison — covers fortification design, prisoner-of-war conditions, and Delaware River military history.

Civil War-era island fort used as a prison camp — covers Union military engineering, prisoner-of-war conditions, and Delaware Bay history.

Civil War–era fort on a Delaware River island — covers prisoner-of-war history, Civil War military operations, and mid-Atlantic geography.

Preserved 18th-century grist mill complex and working farm — colonial industrial history, milling mechanics, and agricultural heritage.

Former du Pont gunpowder works on Brandywine Creek — covers early American industrial history, chemistry of explosives, and 19th-century manufacturing.

Alfred I. du Pont's early-20th-century French chateau estate — covers Gilded Age economic history, estate architecture, and Delaware industrial heritage.

Heritage railroad operating 19th-century steam locomotives through rural Delaware — railroad history, industrial-era transportation, and regional social history.

Country estate museum preserving 175 rooms of American decorative arts — covers material culture, social history, and design from colonial to industrial eras.

18th-century Georgian mansion in one of America's oldest towns — covers colonial-era architecture, Delaware settlement history, and civic life.

Site of the only Revolutionary War battle fought in Delaware — covers the 1777 Philadelphia Campaign and the role of the Southern colonies in the war.

Delaware agricultural museum with farm equipment, tools, and exhibits tracing three centuries of farming technology and rural economic history.

Regional history museum with a dedicated African American heritage center — covers Delaware settlement history and Black history from colonial era through civil rights.

Delaware's outdoor heritage park on The Green in Dover — covers the state's founding, colonial government, and First State constitutional history.

Delaware's First State Heritage Park welcome center with galleries covering colonial founding, state government, and the U.S. Constitution.

National park preserving Delaware's colonial and early American history including the first state to ratify the U.S. Constitution — covers founding-era civics and colonial life.

Former Civil War–era fort site converted to state park — earthwork fortifications and coastal defense history alongside tidal nature trails.

WWII coastal defense installation at Cape Henlopen with restored artillery batteries — covers military history and mid-20th-century coastal fortification engineering.

WWII coastal defense installation within Cape Henlopen State Park — covers Atlantic Theater military history, coastal artillery, and fortification engineering.

Preserved 18th-century colonial town in Delaware with period furnishings and decorative arts — covers colonial-era trade, architecture, and domestic life.

Restored 1876 U.S. Life-Saving Station covering maritime rescue history, navigation, and coastal safety operations.

Restored 18th-century working plantation of Founding Father John Dickinson — covers colonial agriculture, the American Revolution, and early Delaware history.

State-operated museum in the birthplace of the phonograph industry covering the invention and history of recorded sound technology.