In the year 90 [i]n the former Roman province of Syria (located in modern day Jordan), researchers are currently studying a sensational canal system. It extends

In the year 90 [i]n the former Roman province of Syria (located in modern day Jordan), researchers are currently studying a sensational canal system. It extends mostly underground over a distance of 106 kilometers (66 miles). https://www.spiegel.de/international/world/rome-s-tremendous-tunnel-the-ancient-world-s-longest-underground-aqueduct-a-612718.html https://www.spiegel.de/international/world/rome-s-tremendous... https://en.wikipedia.org/wiki/Gadara_Aqueduct https://en.wikipedia.org/wiki/Gadara_Aqueduct