Buy a T-shirt here: http://practical.engineering/shop/ Support these videos on Patreon: http://patreon.com/PracticalEngineering LEARN MORE AT THE LINKS BELOW: Tetrapods - https://en.wikipedia.org/wiki/Tetrapod_(structure) Intracoastal Waterway - https://en.wikipedia.org/wiki/Intracoastal_Waterway Jetty - https://en.wikipedia.org/wiki/Jetty Corner Reflector - https://en.wikipedia.org/wiki/Corner_reflector Daylighting Streams - https://en.wikipedia.org/wiki/Daylighting_(streams) Weir - https://en.wikipedia.org/wiki/Weir Website: http://practical.engineering Music: Elexive - Valley Santa (https://www.youtube.com/watch?v=TA7Hro7OYpc)