Secret Path to Thermopylae - Revealed by Ephialtes the Traitor

This image depicts the secret path, revealed by Ephialtes to the Persians, which the Immortals followed in their final assault at Thermopylae.  Before its existence was known by Xerxes, his forces were unable to penetrate and overcome the defenses mounted by Leonidas and his men.

Credits

Photo by Fotis Kerasaridis, online courtesy Wikimedia Commons.

License:  This photo is licensed under the Creative Commons Attribution ShareAlike 2.5 License. In short: You are free to share and make derivative works of it under the conditions that you appropriately attribute it, and that you distribute it only under a license identical to this one.