Seven monuments made the cut on the guidebook lists ancient Greek travelers compiled to tell each other what was worth seeing in the eastern Mediterranean world: the Great Pyramid of Giza, the Hanging Gardens of Babylon, the Temple of Artemis at Ephesus, the Statue of Zeus at Olympia, the Mausoleum at Halicarnassus, the Colossus of Rhodes, and the Lighthouse of Alexandria. Scholar John Romer travels to each site, or what remains of it, tracing the lists back to Antipater of Sidon and the writer known as Philo of Byzantium, whose surviving accounts shaped which wonders made the final seven. He explains why the Colossus of Rhodes lasted barely fifty years before an earthquake toppled it in 226 BC, and why the Great Pyramid, the oldest entry on every version of the list, is also the only one still standing. Romer treats the wonders less as a fixed inventory than as a moving target, reshuffled by different authors, and asks what these choices reveal about what the Greeks considered worth traveling to see.