This is a pretty cool building to check out in Chicago. You will find incorporated into the lower levels of the tower many relics from the world's most famous buildings: rocks and bricks from the Taj Mahal, the Parthenon, the Great Wall of China, Angkor Wat, Hagia Sofia, the Grand Pyramid... just to name a few. Those souvenirs where brought back by the Tribune's correspondents prior to it's construction in 1925.