Privately owned and operated minivans constitute St. Lucia's bus system, an inexpensive and efficient means of transportation used primarily by local people. Buses have green number plates beginning with the letter "M." They are a good way to travel between Castries and the Rodney Bay area; the fare is EC$2 (ideally payable in local currency). You can also travel from Castries to Soufrière (two-plus hours, EC$10), but that is definitely an arduous ride. Wait at a marked stop and hail the passing minivan. Let the conductor or driver know where you need to go, and he'll stop at the appropriate place.