The ancient Roman army didn’t seem to be afraid of anything, but they definitely weren’t afraid of heights, as evidenced by the discovery of a 2,000-year-old Roman military camp located 7,000 feet above sea level in the Swiss Alps.

As archaeologists continue to explore the history of the Roman army in what is now Switzerland, a volunteer unearthed a previously unknown military camp in the mountains, strategically positioned to have tactical views of the surrounding valleys and mountain passes, according to a translated statement from the Canton of Graubünden.