Yap uses giant stones as currency
While not the only source of money on this small Micronesian island in the Pacific Ocean, the 8,000lb limestone discs known as Raj are still used as currency, although mostly for rituals. Yea, nobody's trading in one of these puppies for a new Kia, if that's what you're thinking. The stone's values were originally determined a number of factors, including their size, the intricacy of their carvings, and how many lives were lost bringing them to the island from Palau. In a canoe. 280mi away!