Nation Treasure hunter unearths silver coins from 300-year-old Spanish shipwreck on Florida beach February 28, 2020Max Chesnes, Treasure CoastComments Off on Treasure hunter unearths silver coins from 300-year-old Spanish shipwreck on Florida beach "Not everyone knows why it's called the Treasure Coast," said Jonah Martinez, a treasure hunter from Port St. Lucie. "This is why."