This location requires a cruise ship to get there, as the cache is on a cruise line's private island. The sand beach and crystal clear waters are as beautiful as you are likely to find. The spot for the cache is only a short walk from the water's edge, but wear shoes, as once you leave the bare sand, there are burrs that will cause bare feet a lot of trouble.
The cache itself is small and hidden to prevent accidental disturbance, as I won't be back to restore it. :-(
But it doesn't require any digging or heavy lifting and the hint gives everything you'll need to find it.
Inside the cache are stamps (which provide a hint for the bonus challenge), a pin of unknown origin and meaning (maybe some finder can identify it) and a flag of Ireland (the cache was buried on St. Patrick's Day). Also included, as a bonus challenge, are the coordinates of five restaurants on other islands in the eastern Caribbean, for the truly adventurous to locate (not necessarily to eat at (hint)). No caches are hidden in the other locations, but some may find it fun enough just to find the spots.