The tiny island of Okunoshima was once home to a major poisonous gas facility for the Imperial Army during World War II. The island, only 4 kilometers in circumference, had even been removed from Japanese maps for a period of time for security purposes. Once the war ended, the island was deserted. In 1971, a teacher from the nearby city of Takehara abandoned the school’s pet rabbits in Okunoshima. Now, the island is host 300 feral rabbits.

With 2011 being the Year of the Rabbit, many tourists are making their way to the little island to see the furry inhabitants.

For more info, see:
Wired.com
Japan Probe