Bricks. From Legos to the blocks that make up the Pyramids, any "recta-cubular" man-made/carved building material. Bricks do not have to be part of a structure.
Contest links on Fark.com: All Entries | Voting Results Click on any photo to view larger size.
El Castillo at Chichen Itza
Crown Fountain in Millenium Park, Chicago
Wall of carved skull blocks at Chichen Itza
