Even though it is only 90 miles from the coast of Florida, Cuba feels a world away. The classic cars, the architecture, the music, and the people all combine to create the sights and sounds of Havana. Dr. Sanjay Gupta traveled to Havana to learn more about the Cuban healthcare system. Despite being one of the poorest countries, Cuba's healthcare is relatively strong in many ways. From a big emphasis on screenings and preventative care to vaccine innovations, Cuba has a lot to offer the medical field. Make the rounds with a family doctor through the streets of Havana and visit the lab where researchers created a lung cancer vaccine, sparking interest in the United States. And take a ride through Havana's old town in a classic car - the best way to see this historic city.