Useful Links 

Links concerning the Lines of Torres Vedras

Rota Histórica das Linhas de Torres (English and Portuguese)
Interpretation Centre for the Lines of Torres
British Historical Society of Portugal - Tours
Friends of the Lines of Torres Vedras - Facebook page (you will need Facebook account)
Circulo de Estudos das Linhas de Torres - Facebook page (you will need a Facebook account)
Conhecer a Rota Histórica das Linhas de Torres - Facebook page (you will need a Facebook account)
Wikipedia entry for the Lines of Torres Vedras
Rota Historica das Linhas de Torres (Youtube video in Portuguese)
Seis grandes fortes Seis pequenos vídeos. (Six large forts, six small videos) (Youtube)

Other Useful Links.

Europa Nostra Award for the Lines of Torres Vedras
​Fortress Study Group
Friends of the British Cemetery at Elvas
Portuguese animation on Lines of Torres Vedras 
​Revista Portuguesa de História Militar
​Waterloo Association

Articles

Trail Guides and Leaflets