Japan is made up of nearly 7,000 islands. The little island of Okunoshima in the Inland Sea is best-known for its curious, big-eared population. The island was used to test chemical weapons during World War II, and it’s said the test subjects roamed free after the war. Either way, the numbers flourished in a predator-free environment (dogs and cats are banned from entering), and today Okunoshima is a popular spot for cuddle-bunny tourists.