The puzzles people open most often.
Caryatids of the Erechtheion, Athens
The Parthenon, Athens
Colourful Houses of Porto
Old Trams of Porto
Porto City Hall
Capela das Almas, Porto
Ribeira and the Douro River, Porto
Azulejo Tiles, Lisbon
Alfama Rooftops, Lisbon
25 de Abril Bridge, Lisbon
Yellow Tram in Lisbon
Retiro Park Monument, Madrid
Gran Vía, Madrid
Almudena Cathedral at Dusk, Madrid
Royal Palace of Madrid
Plaza Mayor, Madrid
Barcelona Beach from Above
Eixample from Above, Barcelona
Arc de Triomf, Barcelona
Tibidabo at Sunset, Barcelona
National Palace of Montjuïc, Barcelona
Courtyard of the Royal Palace, Palermo
Glass Dome of the Galleria, Milan
Spires of Milan Cathedral
Jigsaw