2.6K views · 116 reactions | To build the breathtaking Skywalk Glass Bridge over the Grand Canyon, workers constructed the horseshoe-shaped walkway 50 feet back from the edge, and then slowly rolled it out over the canyon—a system used by the ancient Egyptians to build their pyramids. #25DaysofGetaways Tune into back-to-back episodes of How Did They Build That, hosted by Jay Ellis, starting at tonight at 8 PM! | Smithsonian Channel | Facebook

3K views · 88 reactions | Discover the undisclosed building techniques of these ancient workers and how they were able to build monuments that stood the test of time. Watch Secrets of the Ancient Builders every Wednesday, 8pm BKK/JKT, 9pm HKT/SIN, on National Geographic. | National Geographic Asia | Facebook