Great Britain

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Greenwich

 This postcard was sent by Martinha

South Stack Lighthouse

 The South Stack Lighthouse is built on the summit of a small island off the north-west coast of Holy Island, Anglesey

Stonehenge

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The Ugly House, Betws-y-Coed

 I don't know why this is called the Ugly House, it doesn't seem that ugly

Beaumaris Castle

 This is one of the Castles and Town Walls of King Edward in Gwynedd

Three Graces and Museum of Liverpool

 This postcard was sent by Tündi