The Olympic Games are always proceded by a furious amount of building as host cities construct arenas, pools, ski jumps, Olympic villages, and anything else the games demand. While some of the buildings are repurposed after the athletes depart, others are left to rot.
The Greek embassy estimated that it cost Greece €8.954 billion to host the Summer Olympic Games in 2004, including the construction of the Olympic Village and several shiny new athletic venues. Since then, though, some of those venues have been abandoned, making one Olympic legacy a set of decaying structures.
The Olympic Games first began in the ancient Greek city-state of Olympia. For all its fame, the city suffered a mysterious fate, destroyed by an unknown natural disaster. Now it looks like tsunamis were the culprit...despite being 30 kilometers inland.