A pier is a structure built over water and supported by pillars, A pier is usually used as a place to load and unload ships.
Most of the piers you’ve seen were probably only a few hundred feet long at most. But one pier at El Hasa, on the Persian Gulf in Saudi Arabia, is so long that a walk to the end of it would be a journey in itself.
This pier, the longest in the world, measures more than 6.75 miles in length!
