Cloughoughter Castle

Crom Castle is situated on the shores of the Upper Lough Erne in

Clones Abbey is a ruined monastery that later became an Augustinian

Aghalurcher (Шаблон:Irish place name) was a pre-Norman monastery locat

Castle Balfour is a castle situated just off the Main Street of

Badger Pot and Pigeon Pot are two caves found in the Karst topography

The Marble Arch Caves (Irish: Uaimheanna na hÁirse Marmair) are a

Enniskillen Castle is situated in Enniskillen, County Fermanagh,

Shannon Cave is an active stream passage cave situated in County

Rumkale was a powerful fortress on the river Euphrates, 50 km

Tsarevets (Bulgarian: Царевец) is a medieval stronghold located on a h

Tustan  was a Medieval cliff-side fortress-city and customs site of

The Rock of Cashel (Gaeilge. Carraig Phadraig), also known as Cashel

Hammershus is Northern Europe's largest medieval fortification,