Castell Coch (Castle Coch) (The Red Castle), Tongwynlais, Cardiff, Wales, United Kingdom, Europe

Castell Coch (Castle Coch) (The Red Castle), Tongwynlais, Cardiff, Wales, United Kingdom, Europe

Historic architecture in Edinburgh with the Hub and spires against a cloudy sky, showcasing Scotland's capital city's charm, Edinburgh, Scotland, United Kingdom, Europe

Cannons on ramparts of citadel castle Il-Kastell, Victoria Rabat, Gozo, Malta, Mediterranean, Europe

Staircase in John Rylands Neo-Gothic Library with rare books, Manchester, England, United Kingdom, Europe

Lews Castle, Stornoway, Isle of Lewis, Outer Hebrides, Scotland, United Kingdom, Europe

Harbour of Stornoway, Isle of Lewis, Outer Hebrides, Scotland, United Kingdom, Europe

Lews Castle, Stornoway, Isle of Lewis, Outer Hebrides, Scotland, United Kingdom, Europe

Glengorm Castle near Tobermory, Isle of Mull, Scotland, UK.

Cardiff Castle, The roof garden, Cardiff, Wales

Cardiff Castle, detail, mosaic in The roof garden, Cardiff, Wales

Cardiff Castle, window in the dining room, Cardiff, Wales

outdoor photo, Kylemore Abbey at Kylemore Lough, Connemara, County Galway, Ireland, Europe

outdoor photo, Kylemore Abbey at Kylemore Lough, Connemara, County Galway, Ireland, Europe

Victorian glass greenhouse in a rose garden in the park of Castle Ardgillan in Skerries, County Dublin, Republic of Ireland, Europe