piers — a structure built on posts extending from land out over water, used as a landing place for ships, an entertainment area, a strolling place, etc.; jetty.
wharves — Spinning. a wheel or round piece of wood on a spindle, serving as a flywheel or as a pulley.
barriers — anything built or serving to bar passage, as a railing, fence, or the like: People may pass through the barrier only when their train is announced.
