Altena Castle (''Kasteel van Altena'')

Belgium

Altinaghree Castle

Ireland

Altit Fort

Pakistan

Alvøen Mansion

Norway

Alwar

India

Alwar City Palace

India

Alwar fort

India

Alūksne Castle

Latvia

Ruins

Amadé Castle

Hungary

Amagasaki Castle

Japan

Amalienborg Palace

Denmark

Amasra Castle

Turkey

Roman Empire

Amasya Castle

Turkey

Roman Empire

Ambajidurga

India

Amberd

Armenia

Ambolgad

India

Ambras Palace

Austria

Castle

Amendolea

Italy

Amer Fort

India

American Museum of Natural History

the United States

Amerongen Castle

the Netherlands

Amfissa Castle

Greece

Ancient/Byzantine/Frankish period

Ammameh Castle

Iran

Ammersoyen Castle

the Netherlands

Anadoluhisari

Turkey

Ottoman Empire

Anandgarh Fort

India

Anantpur Fort

India

Anchettidurgam

India

Anchuthengu Fort

India

Ancien Château de Potesta

Belgium

Ancient Fort

India

Andrew Frederick Gault House

Canada

Anegundi Fort

India

Anevo Fortress castle

Bulgaria

Angelokastro (Corfu)

Greece

Byzantine/Venetian periods

Angerja Castle

Estonia