The colourful Caribbean island of Puerto Rico, America’s third largest island, and the only one where Spanish is the main language is Martin’s next stop on his island odyssey.

The first port of call on Martin’s journey is the lush, tropical Ha-waii. His exploration looks beyond Hawaii’s image as a tourist paradise, crammed with sun-kissed beaches and world class surfing, and into the havoc wreaked by advancing lava fields and smoking craters.

Martin arrives in New York for the final leg of his journey to explore Manhattan Island, and its world famous Empire State Building, and nearby Ellis Island.

In this episode Martin’s travels take him 1500 miles to the San Juan Islands in Washington State, just off America’s North West Pacific coast, right on the border with Canada. There are more than 100 islands, mostly uninhabited.