A few weeks ago, on our way to St. Barth from St. Martin, we spent an afternoon anchored at Ile Fourchue. This is a privately owned island but it belongs to the Saint Barth Marine Reserve and there are several yacht moorings available for visiting boats at the reasonable fee of 2 Euro per person per night. The island is deserted but visitors are welcome to go ashore and walk up the craggy hills for beautiful views in all directions. It reminded us (a little bit) of the Baja Peninsula, Mexico.
According to our guide book, at one time this Island had a large population of goats which ate everything in sight, causing huge eroded gullies. Eventually the goats were removed and the island is slowly recovering, cacti are thriving in the rocky soil and there are even a few trees. The most common cactus was barrel shaped with a short stem topped by a red "hat". Since this sort of resembles a Fez, a hat worn by Turkish men during the late Ottoman Empire, it's common name is Turks Head.
Another of our guide books states that Ile Fourchue is a half-sunken volcanic crater which may be true, except for an unusual outcrop of folded basalt columns that did not seem to fit in. It would have been fun to spend a bit of time looking at the other volcanic rocks and maybe figure this out, but the topography was rather steep, the rocks were crumbly and the footing was treacherous so we went snorkeling instead.
Most other yachts use Ile Fourchue as a lunch stop; they grab a mooring ball, eat some food, go for a swim and then leave. After all St. Barths is less than 5 miles away and there you can eat at a fancy expensive restaurant and party all night. We enjoyed the evening solitude and could have stayed several nights; this is the only place (so far) in the Caribbean where there was nothing but nature onshore.