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.

History, plan and visitor information for this Victorian fortress outside Plymouth, UK, from the official site. Restored and owned by the Landmark Trust.

The story of the sole restored coastal artillery fort from Fortress Singapore, 1874 to the present.

A multilingual Internet portal dedicated to European military heritage.

Fortresses of northwest Russia and Finland. Photographs, maps, histories, and personal observations.

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.

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].

Peter Hibbs charts the history, construction, siting and individual history of each of the 74 English south coast Martello Towers.

Researches and records fortified sites throughout the UK. Journal, membership and news.

Includes most of the towns and cities in Europe with surviving town walls. Photographs, information.