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Aberdeen

Beaumaris Castle

Bodelwyddan

Bolton Abbey

Bryn Celli Ddu

Byland Abbey

Carreg Cennen

Castle Hedingham

Conway

Finchingfield

Fountains Abbey

Framlingham

Helmsley Castle

Huntly Castle

Kirkham Priory

Mount Grace

Orford

Rievaulx Abbey

Saint Davids

Tremadog

Welsh Show Caves

Wharram Percy

Whitby Abbey

York Minster

The henge and barrow

The entrance to the tomb

The corridor to the burial chamber

Information about Bryn Celli Ddu on Wikipedia.