Parthenon · Acropolis
It survived 2,000 years, until someone stored gunpowder inside
The Parthenon was a temple, a treasury, a church and a mosque. In 1687, during a Venetian siege, the Ottoman garrison was keeping gunpowder in it. A Venetian shell hit the building, and the explosion tore out its middle. Most of the ruin you see dates from that single day.