You have heard of the Atlantic triangle trade in school. It is always discussed in terms of its economic logic (e.g. English rum to African slaves to New World sugar). But the trade has a physical logic as well in the sailing ship era. Current wind patterns:
Seriously, click on the real time link. Even if you are jaded, probably the coolest thing you will see today. One interesting thing to look at -- there is a low point in the spine of the mountains of Mexico west of Yucatan. Look at the wind pour through it like air out of a balloon.