 | Fort DeRussy MakerOrt · Washington | Jerrye & Roy Klotz, MD | CC BY-SA 3.0 | Original ↗ |
 | Fort Desoto BatteriesOrt · Saint Petersburg | Beyond My Ken | CC BY-SA 4.0 | Original ↗ |
 | Fort DetroitOrt · Detroit | Pierre Descomps | Public domain | Original ↗ |
 | Fort Douglas Military MuseumOrt · Salt Lake City | Beneathtimp | CC0 | Original ↗ |
 | Fort du Mont AlbanOrt · Nizza | C. Martino | CC BY-SA 4.0 | Original ↗ |
 | Fort DuquesneOrt · Pittsburgh | Sébastien Paquin | CC BY-SA 3.0 | Original ↗ |
 | Forte AntenneOrt · Rom | Flazaza | CC BY-SA 4.0 | Original ↗ |
 | Forte BegatoOrt · Genua | Bbruno | CC BY-SA 3.0 | Original ↗ |
 | Forte BelvedereOrt · Genua | Bbruno at Italian Wikipedia | Public domain | Original ↗ |
 | Forte BravettaOrt · Rom | Federico.roma | Public domain | Original ↗ |
 | Forte CarpenedoOrt · Venedig | Comune di Venezia | CC BY 3.0 | Original ↗ |
 | Forte CrocettaOrt · Genua | Bbruno | CC BY-SA 3.0 | Original ↗ |
 | Forte de Santa ApolóniaOrt · Lissabon | Ruipmartins | CC0 | Original ↗ |
 | Forte di BelvedereOrt · Florenz | Sailko | CC BY-SA 3.0 | Original ↗ |
 | Forte di Vigliena | NaplesOrt · Neapel | Ferdinando Scala | CC BY-SA 3.0 | Original ↗ |
 | Forte Fratello MaggioreOrt · Genua | Bbruno | CC BY-SA 3.0 | Original ↗ |
 | Forte Fratello MinoreOrt · Genua | Bbruno | CC BY-SA 3.0 | Original ↗ |
 | Forte GazzeraOrt · Venedig | Luca.favorido | CC BY-SA 4.0 | Original ↗ |
 | Forte La CarnaleOrt · Salerno | Giaros | CC BY-SA 4.0 | Original ↗ |
 | Forte MezzacapoOrt · Venedig | Luca.favorido | CC BY-SA 4.0 | Original ↗ |
 | Forte Monte MarioOrt · Rom | unbekannt | CC BY 2.0 | Original ↗ |
 | Forte MonterattiOrt · Genua | GLf | CC BY-SA 3.0 | Original ↗ |
 | Forte PuinOrt · Genua | Bbruno | CC BY-SA 3.0 | Original ↗ |
 | Forte QuezziOrt · Genua | Bbruno | CC BY-SA 3.0 | Original ↗ |
 | Forte RichelieuOrt · Genua | Original uploaded by Bbruno (Transfered by Bbruno) | Public domain | Original ↗ |
 | Forte San GiulianoOrt · Genua | Superchilum | CC BY-SA 4.0 | Original ↗ |
 | Forte San MassimoOrt · Verona | Imperiale Regio Ufficio delle Fortificazioni di Verona / … | Public domain | Original ↗ |
 | Forte San PietroOrt · Livorno | sconosciuto | Public domain | Original ↗ |
 | Forte Santa LuciaOrt · Verona | Imperiale Regio Ufficio delle Fortificazioni di Verona / … | Public domain | Original ↗ |
 | Forte Sant'AndreaOrt · Venedig | Didier Descouens | CC BY-SA 4.0 | Original ↗ |
 | Forte Santa TeclaOrt · Genua | Sidvics | CC BY-SA 3.0 | Original ↗ |
 | Forte SofiaOrt · Verona | Andrea Bertozzi | CC BY-SA 4.0 | Original ↗ |
 | Forte SperoneOrt · Genua | Bbruno | CC BY-SA 3.0 | Original ↗ |
 | Fortezza NuovaOrt · Livorno | Shezarainbow | Public domain | Original ↗ |
 | Fortezza VecchiaOrt · Livorno | Sailko | CC BY 3.0 | Original ↗ |
 | Fort Garry Place IIOrt · Winnipeg | Bobak Ha'Eri | CC BY 3.0 | Original ↗ |
 | Fort GlanvilleOrt · Adelaide | Peripitus | CC BY-SA 3.0 | Original ↗ |
 | Fort Greble ParkOrt · Washington | Unknown author Unknown author or not provided | Public domain | Original ↗ |
 | Fort GrodziskoOrt · Danzig | Gdaniec | CC BY 3.0 | Original ↗ |
 | Fort Hamilton, BrooklynOrt · New York | JeffreyW75 at English Wikipedia | GFDL | Original ↗ |
 | Forth Banks Power StationOrt · Newcastle upon Tyne | Unknown authorUnknown author | Public domain | Original ↗ |
 | Fort Homer W. Hesterly ArmoryOrt · Tampa | TampAGS | CC BY-SA 3.0 | Original ↗ |
 | Fortifications of BrusselsOrt · Brüssel | unbekannt | CC BY-SA 3.0 | Original ↗ |
 | Fort IIaOrt · Posen | Rzuwig | CC BY 3.0 | Original ↗ |
 | Fort IIIOrt · Posen | Rzuwig | Public domain | Original ↗ |
 | Fort IndependenceOrt · Boston | Chris Wood (User:chris_j_wood). | CC BY-SA 4.0 | Original ↗ |
 | Fortino di Sant'IgnazioOrt · Cagliari | piantisergio | CC BY 3.0 | Original ↗ |
 | Fortitude Valley Primitive Methodist ChurchOrt · Brisbane | reubot | CC BY-SA 4.0 | Original ↗ |
 | Fort IVOrt · Köln | HOWI - Horsch, Willy | CC BY 3.0 | Original ↗ |
 | Fort IVaOrt · Posen | Konrad Dąbrowski, Rzuwig | CC BY-SA 3.0 | Original ↗ |
 | Fort IXOrt · Posen | Rzuwig | Public domain | Original ↗ |
 | Fort Jackson (Alabama)Ort · Montgomery | Altairisfar | Public domain | Original ↗ |
 | Fort Jackson (Georgia)Ort · Savannah | MArcin K | CC BY-SA 3.0 | Original ↗ |
 | Fort JayOrt · New York | SebastianBlumeArt | CC BY-SA 4.0 | Original ↗ |
 | Fort JohnsonOrt · Charleston | Conrad Wise Chapman | Public domain | Original ↗ |
 | Fort Lowell MuseumOrt · Tucson | Tony the Marine (talk) | CC BY-SA 3.0 | Original ↗ |
 | Fort MacArthur MuseumOrt · Los Angeles | Regular Daddy | CC BY 2.5 | Original ↗ |
 | Fort MacombOrt · New Orleans | Infrogmation | CC BY 2.5 | Original ↗ |
 | Fort MacquarieOrt · Sydney | Unknown | Public domain | Original ↗ |
 | Fort Massapeag Archeological SiteOrt · Oyster Bay | DanTD | CC BY-SA 4.0 | Original ↗ |
 | Fort McIntoshOrt · Laredo | unbekannt | Public domain | Original ↗ |
 | Fort MifflinOrt · Philadelphia | Joe Minardi | CC BY 2.5 | Original ↗ |
 | Fort MontlucOrt · Lyon | Xavier Caré / Wikimedia Commons / CC-BY-SA | CC BY-SA 3.0 | Original ↗ |
 | Fort Moore Pioneer MemorialOrt · Los Angeles | Another Believer | CC BY-SA 4.0 | Original ↗ |
 | Fort NashboroughOrt · Nashville | JERRYE & ROY KLOTZ MD | CC BY-SA 3.0 | Original ↗ |
 | Fort Negley ParkOrt · Nashville | George Barnard | Public domain | Original ↗ |
 | Fort NorfolkOrt · Norfolk | Charles E. Cassell | Public domain | Original ↗ |
 | Fort OmahaOrt · Omaha | Dolph72 | Public domain | Original ↗ |
 | Fort PaulOrt · Köln | HOWI - Horsch, Willy | CC BY 3.0 | Original ↗ |
 | Fort PearceOrt · Melbourne | not stated | Public domain | Original ↗ |
 | Fort Perch RockOrt · Liverpool | Rodhullandemu | CC BY-SA 4.0 | Original ↗ |
 | Fort PikeOrt · New Orleans | Olineman | Public domain | Original ↗ |
 | Fort Pitt Block HouseOrt · Pittsburgh | en:User:Kevin Myers | CC BY-SA 3.0 | Original ↗ |
 | Fort Pitt MuseumOrt · Pittsburgh | Allie Caufield | CC BY 2.0 | Original ↗ |
 | Fort Point AreaOrt · San Francisco | Clyde Charles Brown | CC BY-SA 4.0 | Original ↗ |
 | Fort Pointe-aux-TremblesOrt · Montreal | Charny | CC BY-SA 3.0 | Original ↗ |
 | Fort Point National Historic SiteOrt · San Francisco | Kingofthedead | CC BY-SA 4.0 | Original ↗ |
 | Fort PrudhommeOrt · Memphis | Vincenzo Coronelli | Public domain | Original ↗ |
 | Fort Reditowy nr 15 PSZORNAOrt · Krakau | Dwxn | CC BY-SA 4.0 | Original ↗ |
 | Fort RémyOrt · Montreal | Alexis de Barbezieux ("Père Alexis") (1854 - 1941) | Public domain | Original ↗ |
 | Fortress of JustinianOrt · Tirana | Ardit Ajdini | CC BY-SA 4.0 | Original ↗ |
 | Fort Rolland Apartments LidOrt · Montreal | Parcours riverain - Ville de Montréal from Canada | CC BY 2.0 | Original ↗ |
 | Fort Rouillé MonumentOrt · Toronto | Unknown author Unknown author | Public domain | Original ↗ |
 | Fort Royal de l'Île Sainte-MargueriteOrt · Cannes | Museesc | CC BY-SA 4.0 | Original ↗ |
 | Fort Saint-JeanOrt · Marseille | Robert Valette | CC BY-SA 3.0 | Original ↗ |
| Fort Saint-NicolasOrt · Marseille | Robert Valette | CC BY-SA 3.0 | Original ↗ |
 | Fort Saint-sauveurOrt · Lille | VIGNERON | CC BY-SA 3.0 | Original ↗ |
 | Fort Sam Houston Quadrangle and MuseumOrt · San Antonio | Clyde Charles Brown | CC BY-SA 4.0 | Original ↗ |
 | Fort Sanders ManorOrt · Knoxville | Kurz and Allison | Public domain | Original ↗ |
 | Fort SchuylerOrt · New York | User:Jim.henderson | CC BY-SA 3.0 | Original ↗ |
 | Fort Slocum ParkOrt · Washington | William Morris Smith | Public domain | Original ↗ |
 | Fort St. JohnOrt · New Orleans | Infrogmation, New Orleans | CC BY 2.5 | Original ↗ |
 | Fort StocktonOrt · San Diego | Bruce Roberson | CC BY-SA 3.0 | Original ↗ |
 | Fort Sumter Charleston HarborOrt · Charleston | George Edward Perine | Public domain | Original ↗ |
 | Fort Sumter House AssociationOrt · Charleston | E. C. Kropp Co., Milwaukee (publisher) | Public domain | Original ↗ |
 | Fort Sumter National MonumentOrt · Charleston | Staib | CC BY-SA 3.0 | Original ↗ |
| Fort Sumter National MonumentOrt · Charleston | Staib | CC BY-SA 3.0 | Original ↗ |
 | Fort Swoszowice - MuzeumOrt · Krakau | MSzybalski | CC BY-SA 3.0 | Original ↗ |
 | Fort TompkinsOrt · New York | whomever | CC BY-SA 2.0 | Original ↗ |
 | Fort TompkinsOrt · New York | Unknown photographer | Public domain | Original ↗ |