When it comes to tourist pilgrimage sites in the United States, the Hoover Dam may not quite rank up there with the Statue of Liberty, the Lincoln Memorial, Mount Rushmore, the Grand Canyon, or Disneyland. But that’s not due to a lack of importance, nor even a lack of impressiveness. Proper appreciation of its man-made majesty, however, requires an understanding of not just the vital function it serves, but the enormous task of its construction. The guides at the Hoover Dam have been trained to explain just that to its many visitors, of course, but all of us could benefit from going in prepared with a little knowledge. Watch the hour-long video on the dam’s design and construction from Animagraffs above, and you may be prepared with enough knowledge to tell the guides a thing or two.Animagraffs is the YoTtube channel of Jacob O’Neal, which we’ve previously featured here on Open Culture for its acclaimed explanations on a sixteenth-century explorer’s sailing ship and the Golden Gate Bridge, another iconic construction project of the Great Depression. Like those, his Hoover Dam video uses detailed 3D models based on serious research, not least into the project’s original design documents.This allows O’Neal to show each element of the dam and its complex system of supporting infrastructure in detail and from every angle, as well as in a kind of x‑ray vision. We’ve all seen photographs of the Hoover Dam, and maybe even bought some from its gift shop, but even the most sublime aerial view doesn’t reveal as much about its ambition as a look into its inner workings.And the ambition of the Hoover Dam is one aspect guaranteed to impress any viewers. It required thousands of workers about five years to re-shape the Nevada and Arizona landscape at a grand enough scale to make possible human control of the mighty — and, more to the point, mightily unpredictable — Colorado River. With its large turbines, the engineering and installation of which O’Neal explains in full, it managed to generate enough electricity to repay its construction cost of more than $811 million in today’s dollars by 1987, just over 50 years after it opened. And in an achievement almost impossible to believe today, it opened more than two years ahead of schedule. We hear a good deal today about the concept of “state capacity,” and how the U.S. could regain it. At the Hoover Dam, we behold state capacity quite literally made concrete.Related Content:The Incredible Story of the Hoover DamThe Genius Urban Design of Amsterdam: Canals, Dams & Leaning HousesHow Medieval Islamic Engineering Brought Water to the AlhambraThe Genius Engineering of Roman AqueductsThe Brilliant Engineering That Made Venice: How a City Was Built on WaterDiscover Ansel Adams’ 226 Photos of U.S. National Parks (and Another Side of the Legendary Photographer)Based in Seoul, Colin Marshall writes and broadcasts on cities, language, and culture. He’s the author of the newsletter Books on Cities as well as the books 한국 요약 금지 (No Summarizing Korea) and Korean Newtro. Follow him on the social network formerly known as Twitter at @colinmarshall.