Select different State:
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| Fort Saulsbury (historical) | Fort Saulsbury (historical) | Sussex | 3 | Mispillion River |
| United States Army Air Warning Station Number 11 (historical) | United States Army Air Warning Station Number 11 (historical) | Sussex | 13 | Bethany Beach |
| New Castle Army Air Field (historical) | New Castle Army Air Field (historical) | New Castle | 69 | Wilmington South |
| Fort Miles (historical) | Fort Miles (historical) | Sussex | 3 | Cape Henlopen |
| Battery Haslet (historical) | Battery Haslet (historical) | Sussex | 3 | Mispillion River |
| Battery Hall (historical) | Battery Hall (historical) | Sussex | 3 | Mispillion River |
| Fort Dupont (historical) | Fort Dupont (historical) | New Castle | 7 | Delaware City |
| Battery Read (historical) | Battery Read (historical) | New Castle | 7 | Delaware City |
| Battery Gibson (historical) | Battery Gibson (historical) | New Castle | 13 | Delaware City |
| Battery Rodney (historical) | Battery Rodney (historical) | New Castle | 26 | Delaware City |
| Battery Clermont Best (historical) | Battery Clermont Best (historical) | New Castle | 23 | Delaware City |
| Battery Alburtis (historical) | Battery Alburtis (historical) | New Castle | 3 | Delaware City |
| Battery Torbert (historical) | Battery Torbert (historical) | New Castle | 3 | Delaware City |
| Battery Allen (historical) | Battery Allen (historical) | New Castle | 3 | Delaware City |
| Battery Hentig (historical) | Battery Hentig (historical) | New Castle | 7 | Delaware City |
| Battery Dodd (historical) | Battery Dodd (historical) | New Castle | 3 | Delaware City |
| Coast Guard Station Indian River Inlet | Coast Guard Station Indian River Inlet | Sussex | 7 | Bethany Beach |
| Dover Air Force Base | Dover Air Force Base | Kent | 20 | Little Creek |