While we mainly deal with land locked treasure I do have an interest in sunken treasure. A few weeks ago I was researching old newspaper articles and came across a story from 1907. It seems that in the 1800's a steamer named Golden Gate was sailing along the east coast of Mexico when a fire broke out in the engine room. The Golden Gate was carrying a cargo of $4,000,000 in gold. In an attempt to beach the ship the captain headed to shore where the ship burned at the waters edge about 17 miles north of Manzanillo, Several attempts where made at recovering the cargo. From what I can find about $1.4 million was recovered. A little more research should reveal more information about what became of this wreck. If nothing else this might be a fun area to go dive in hopes that something good was left for a lucky treasure hunter.
Good Luck and Good Hunting!