This magnificent 300 year old Ceiba Tree grows on the right side of the road on the way to Green Beach. Click on minis at right to enlarge.

Another interesting, but POISONOUS, tree that grows in Vieques:

Antigua Flora: Manchioneel
MANCHIONEEL
Family: Euphorbiacea - Hippomane mancinella
This large poisonous tree grows uncommonly behind beaches.  The fruit resembles a small green apple; it is poisonous, so don’t sample it!

The Caribs took the white sap of a broken twig and spread it on their arrowheads as poison. An immediate antidote is seawater.
Do not touch any part of the tree, or stand under it in the rain.

A website about the flora and fauna of Antigua shows many photos of trees common in Vieques, although the common name may be different.