You build a house from the ground up, but you sculpt a sandcastle from the top down. Especially when it's a sandcastle made from 100 metric tons of sand dumped into the middle of a shopping mall and initially encased in huge wooden forms to build out the rough shape before sculpting, as master sandcastle builder David Billings and his crew demonstrate:
That's footage from the Nat Geo Amazing! show, a ten-part series that premiered last week. Show topics run the gamut from animal defense tactics to Shaolin monks to man-eating snakes, along with more design-related stuff; NG has graciously provided us with some exclusive design-y content from upcoming shows, so stay tuned for more cool footage in the coming days and weeks.