Travelling to Italy - 500 Piece Trefl Panorama Jigsaw Puzzle - The colours of the buildings and the sky were quite distinct so this was quite a straightforward one. : r/Jigsawpuzzles
TREFL Panorama 500 Piece Jigsaw Puzzles, Big Ben and Palace of Westminister, 5900511295078 | eBay
Trefl 500 Piece Panorama Jigsaw Puzzle, Big Ben and Palace of Westminster, London, Sunset - Walmart.com