In a new book, artist Jose Dávila ponders, "How many buildings around the world have such distinctive designs that simply their outline, and nothing else, is enough to identify them?" Focusing on silhouettes, Dávila excises structures from photographs leaving nothing but a void. It's easy to fill in the blanks for some—like the Great Pyramid at Giza—but others—like the Burj al Arab—are a bit more obscure. In the following slideshow, spy 10 of the projects in There But Not by Jose Dávila, published by powerHouse Books. Get your thinking caps on and see how many you can identify.