The proof is at Jericho — the real Jericho, not the storied place of the Bible but the historical site, known today as Tell es-Sultan (Hill of the Sultan), located in the modern-day West Bank. Not only the oldest city wall known to us, the ninth-millennium site is also by most estimates the oldest city, full stop.

Did the walls of Jericho actually fall?

The Wall of Jericho was destroyed when the Israelites walked around it for seven days carrying the Ark of the Covenant. On the seventh day, Joshua commanded his people to blow their trumpets made of rams' horns and shout at the walls until they finally fell down.

Where would Jericho be today?

Jericho is located in the Jordan River Valley in modern Palestine. At an elevation of 864 feet below sea level, Jericho is not only the oldest city on Earth but also the lowest one.