A struggling beach town needed tourists, so its postmaster sank a mailbox 30 feet underwater

Susami is a small fishing town in Wakayama Prefecture, Japan, with a population of around 3,700 people. By 1999, it was the kind of place tourists drove through without stopping. Toshihiko Matsumoto, the town’s 70-year-old postmaster, thought he could fix that. His solution was to sink a