Bolung Fort

India

Bon Revoir Castle

Belgium

Boroșneu Mic

Romania

Borrebjerg

Denmark

Borsod Forthill

Hungary

Borsosberényi Castlehill

Hungary

Bottyánsánc

Hungary

Bozsok District

Hungary

Bozzano Castle

Italy

Bošany Castle

Slovakia

Boťany Castle

Slovakia

Braničev Castle

Slovakia

Brattingborg

Denmark

Breń Castle

Poland

Bronka Castle

Ukraine

Brusasco Castle

Italy

Bruti Berd, Artsvanist

Armenia

Bucelleni-Ruard Manor

Slovenia

Budang Gaari Fort

India

Budinarci Fortress

North Macedonia

Budkovce Castle

Slovakia

Burg Falkenstein (Niederfalkenstein)

Austria

Burg Kammerstein/ Ehrenfels

Austria

Burgruine Leobenegg

Austria

Burgruine Rauchenkatsch

Austria

Burgruine Stein/Jauntal

Austria

Burgruine Wildon

Austria

Burgruinen Trixen (Nieder-, Ober-, Mittertrixen)

Austria

Buria Fort

India

Burio

Italy

Burj al-Sabi

Syria

Ruins

Burjs of Pirallahi

Azerbaijan

Bučin Fortress

North Macedonia

Bychawa Castle

Poland

Bácsalmás Castle

Hungary

Báthori Castle

Hungary