Spot-The-Difference Architecture: 40 Brain-Bending Photographic Puzzles

Take a world tour of stunning architecture, from Moscow's Saint Basil's Cathedral to Melbourne's Flinders Street Station. Each magnificent color spread features a picture of the same building on both pages, but with 20 differences between the original on the left and the altered image on the right. The sites include the Chrysler Building, Painted Ladies, Forbidden City, Taj Mahal, and Saint Peter's Basilica.