Saint Martin/Sint Maarten
The small island (57.4 sq. km) of São Vicente, the most densely populated island in Brazil, houses part of the city of São Vicente as well as part of what other city and a container port of the same name, the busiest in Latin America?
Which island was sold by Genoa to France in 1764, was ruled by Britain for two years from 1794 to 1796, and then returned to France?