Yucatan Peninsula, MX and the Yucatan Platform
(aka Yucatan Shelf, Campeche Platform, Campeche Shelf)
 

Figure 1. The Yucatan is a part of Mexico and borders on the Central American countries of Belize and Guatemala.  The map below gives a better idea of where Yucatan lies in relation to the rest of the Caribbean, as well as indicating the outline of the Yucatan Platform.
Figure 2. Shaded relief map showing the most prominent continental shelves and oceanic platforms of the Caribbean region: the West Florida Shelf, the Yucatan Platform, the Bahama Platform and the Nicaragua Rise. All are underlain by blocks of continental crust. 

.