Hässelbyholm Castle

Sweden

Private residence

Högestad Castle

Sweden

Private residence

Hörningsholm Castle

Sweden

Private residence

Højriis Castle

Denmark

Hăghig

Romania

Hălmagiu

Romania

Icheri Bazar Castle

Azerbaijan

Ichijōdani Castle

Japan

Idar Fort

India

Iernut

Romania

Ig Castle

Slovenia

Iga Ueno Castle

Japan

Iha Castle

Japan

Il Castellaro

Italy

Ilava Castle

Slovakia

Ilha Fiscal

Brazil

Ilok Castle

Croatia

Ilona Castle

Hungary

Ilpenstein Castle

the Netherlands

Imabari Castle

Japan

Imde Castle

Belgium

Imola

Italy

Impruneta

Italy

Ina Castle

Japan

Indor Fort

India

Indori fort

India

Indrai fort

India

Induno Olona

Italy

Ingelmunster Castle

Belgium

Inohana Castle

Japan

Inowrocław

Poland

Inowłódz

Poland

Inselšanac

Serbia

Demolished in the 19th century

Introd Castle

Italy

Inuyama Castle

Japan

Ioannina Castle

Greece

Byzantine/Ottoman period