This a journey across various private islands, showcasing the stark differences in luxury and features based on their price tags. It starts with the world's cheapest private island, a mere dollar, and progressively moves up to a $250 million private island. Along the way, it highlights a monkey-infested island, a frozen winter wonderland island, a highly luxurious island with multiple submarines and helicopters, a large island with ancient ruins, and finally, the most expensive island featuring an amusement park with numerous waterslides, exotic animals, and extensive amenities.