The Roman Wall of Lugo
- The City Council of Lugo describes the remarkably complete and well-preserved Roman town wall now a World Heritage Site. Includes history, illustrations and bibliography. [English, French, Galician, Spanish].
- http://www.lugo.es/turismo/muralla.asp

The medieval fortified town of Aigues Mortes
- Fortified town in the South of France with its original 13th century walls and towers, built by King Louis IX.
- http://languedoc-france.info/030416_aiguesmortes.htm

Greystone Court
- This New York stone castle serves as a location rental for film, video and photo shoots.
- http://www.greystonecourt.com

Parks Canada: Fortress of Louisbourg
- History, description, images and visitor information for the reconstructed 18th-century fortified town.
- http://www.pc.gc.ca/lhn-nhs/ns/louisbourg/

The City Wall of Visby, Gotland
- An illustrated description and additional photographs by Goran Andersson of the city wall, which has 36 towers still intact.
- http://www.bingeby.com/city-wall-eng.html

Palmerston Forts Society
- An educational charity dedicated to the study of Victorian fortifications in the UK and their artillery. Includes the activities of the group, list of forts and maps and plans.
- http://www.palmerstonforts.org.uk/

UK Fortifications Club
- Researches and records fortified sites throughout the UK. Journal, membership and news.
- http://www.ukfortsclub.org.uk/

The South Coast Martello Towers
- Peter Hibbs charts the history, construction, siting and individual history of each of the 74 English south coast Martello Towers.
- http://www.martello-towers.co.uk/

Northern Fortress
- Fortresses of northwest Russia and Finland. Photographs, maps, histories, and personal observations.
- http://www.nortfort.ru/

Bunkertours
- An extensive photodocumentary of numerous mothballed and redundant underground military installations in Britain and France, including photographs of ROTOR sites, the Maginot Line, and Cold War sites. Also provides reports from physical visits.
- http://www.bunkertours.co.uk/

Castles, Fortresses, and Palaces of the World
- Images and brief descriptions from Glass, Steel and Stone of a selection of major buildings from medieval to 19th-century.
- http://glasssteelandstone.com/ByTypeCastles.html

Fort Siloso
- The story of the sole restored coastal artillery fort from Fortress Singapore, 1874 to the present.
- http://www.fortsiloso.com

Coastal Fortification on the Gulf of Mexico
- Andrew Bennett provides photographs and history of coastal fortifications of four generations from 1817 to World War II.
- http://andy_bennett.home.mindspring.com/coastal.html

Fort McHenry, Baltimore, United States
- Built 1794-1803 on a five-pointed star plan. Description and photographs from National Park Service Baltimore Travel Itinerary.
- http://www.cr.nps.gov/nr/travel/baltimore/b1.htm

Medieval Fortifications
- Expandable thumbnail images of Aigues-Mortes, Carcassonne and Pierrefonds in France from Jeffrey Howe's Digital Archive of Architecture.
- http://www.bc.edu/bc_org/avp/cas/fnart/arch/medieval_fort.html

Crownhill Fort
- History, plan and visitor information for this Victorian fortress outside Plymouth, UK, from the official site. Restored and owned by the Landmark Trust.
- http://www.crownhillfort.co.uk

Chester: A Virtual Stroll Around the Walls
- Steve Howe of the Black and White Picture Place provides a guide around the Roman and medieval city wall. Map, modern and archival images with description and history, including quotations from primary sources.
- http://www.bwpics.co.uk/chester.walls.index.html

Fortress of Louisbourg
- The Louisbourg Institute provides history, images, bibliography and visitor information for the fortified town in Canada, whose fortifications were rebuilt in the 1960s to their state in 1744. Searchable site.
- http://fortress.uccb.ns.ca/homeeng/default.htm

The Fortress of Neuf-Brisach, France
- Illustrated description from an exhibition at the National Gallery of Art, Washington, of the fortress town constructed 1698-1720, designed by Sébastien Le Prestre de Vauban.
- http://www.nga.gov/exhibitions/2000/baroque/indepth6.htm

Walled Towns Friendship Circle
- Includes most of the towns and cities in Europe with surviving town walls. Photographs, information.
- http://www.walledtowns.com/