BLUFFTON, Texas (AP) — Johnny C. Parks died two days before his first birthday more than a century ago. His grave slipped from sight along with the rest of the tiny town of Bluffton when Lake Buchanan was filled 55 years later.

Now, the cracked marble tombstone engraved with the date Oct. 15, 1882, which is normally covered by 20 to 30 feet of water, has been eerily exposed as a yearlong drought shrinks one of Texas' largest lakes.

Across the state, receding lakes have revealed a prehistoric skull, ancient tools, fossils and a small cemetery that appears to contain the graves of freed slaves. Some of the discoveries have attracted interest from local historians, and looters also have scavenged for pieces of history. More than two dozen looters have been arrested at one site....