This doesn’t look like much now, but in Ancient Rome, it was said to be a massive chasm that lead straight to the underworld. Legend has it that an oracle told the people of Rome that unless they sacrificed what made Rome strong, the chasm would never close and that the Roman Republic would be destroyed. Marcus Curtius, a brave leader, suited up with his best armour and rode his horse right into the underworld. The chasm then closed. It is still a popular local legend to this day.