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.

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.