The article highlights 15 incredible treasures that have been discovered by accident. These treasures range from ancient artifacts to valuable artworks, and they were found in various locations around the world. Some of the notable discoveries include a collection of Roman coins found in Spain, a cache of gold coins unearthed by a California couple while walking their dog, and a painting by renowned artist Vincent Van Gogh found in a Norwegian attic. These accidental discoveries serve as a reminder of the hidden treasures that lie beneath the surface and the importance of being open to unexpected finds.

Overall, the article showcases the element of surprise and luck involved in stumbling upon valuable treasures and emphasizes the thrill of uncovering these hidden gems by chance.