Region
- Abbott Farm National Historic Landmark (Hamilton (Mercer County, N.J.)) 1 results
- Abbott Farm National Landmark (Trenton, N.J.) 1 results
- Alabama 2 results
- Alaska 1 results
- Albany 1 results
- Albany (N.Y.) 1 results
- Albemarle County (Va.) 1 results
- America 4 results
- Amérique du Nord 9 results
- Amřique du Nord 1 results
- Amérique du Nord 1 results
- Arizona 1 results
- Arkansas 4 results
- Athens 1 results
- Athens (Pa.) 1 results
- Bedford County (Va.) 1 results
- Berks County 2 results
- Berks County (Pa.) 2 results
- Beverwyck (N.Y.) 1 results
- Blueberry Hill Site (Dover, Del.) 1 results
- Bucks County 1 results
- Bucks County (Pa.) 1 results
- California 1 results
- Canada 2 results
- Canada, Eastern 1 results
- Chaunis Temoatan 2 results
- Choptank River (Del. and Md.) 1 results
- Christiana 2 results
- Christiana (Del.) 1 results
- Colombie-Britannique (Canada) 1 results
- Colorado 3 results
- Delaware 16 results
- Delaware County (Pa.) 1 results
- Delaware River Valley 1 results
- Delaware River Valley (N.Y.-Del. and N.J.) 6 results
- Delaware Water Gap National Recreation Area (N.J. and Pa.) 1 results
- Delaware, Vallée de la (N.Y.-Del. et N.J.) 1 results
- Delmarva Peninsula 1 results
- Detroit 1 results
- Detroit (Mich.) 1 results
- Dorchester (Md.) 1 results
- Dorchester County (Md.) 1 results
- Dover 3 results
- Earth (Planet) 1 results
- États-Unis 3 results
- États-Unis (Nouveau Sud-Ouest) 1 results
- Fort Detroit (Detroit, Mich.) 1 results
- Gallatin County (Ill.) 1 results
- Geography 1 results
- Georgia 3 results more…