The very concept of the internet is so mind-boggling, it's easy to overlook the equally mind-boggling practical mechanics that make it happen.
Business Insider has created an animated map showing the 550,000 miles of undersea cable that make the world wide web go 'round. The first ever transatlantic cable was laid back in the 1850s and used to send telegraphs. Since then, at least 300 more have been installed, the longest of which spans 24,000 miles from Germany to Korea. Some of the fiber optic bundles are as deep as 25,000 feet below the surface of the ocean.
Watch the many cables weave their way through the oceans in the video above.