A woman found a 2.3-carat diamond at Crater of Diamonds State Park, which she intends to set in her engagement ring.

In southwest Arkansas, the state government runs what might be the world’s most unusual diamond mine. For the price of a movie ticket, anyone can dig for diamonds at Crater of Diamonds State Park—and ...

From Florida to Nevada, these popular state parks should be on your radar for end of summer and fall getaways.