Castries, St. Lucia: St. Lucia is almost a misplaced island, and looks more like a Pacific island than one in the Caribbean. The island was formed by Volcanism, and even today, there is evidence of volcanic activity.
One of the most distinctive features of the island are the twin Pitons, which are essentially volcanic plugs. Gros Piton is some 2,500ft high, while Petit Piton is about 100ft shorter. They are distinctive in that they have seemingly almost vertical walls. However, Gros Piton can easily be climbed.
The island also has what is called a "drive-in Volcano"; La Soufrière (the sulphur air). In reality it is a caldera formed from a collapsed volcano, and is still somewhat active today, with boiling water and sulphur discharge. The last significant volcanic activity was around 200 years ago, but with some current volcanic activity remaining today, this activity is closely monitored for any significant changes.
In addition to being a cruise port, "Sandals" has a nice hotel situated near Castries - the capital of St. Lucia.