Apart from a chance to see Burt Lancaster in one of his last films, I can see not one reason to see this film. It's an ugly story with characters who are pretty trashy...and you really don't care whether or not there's any treasure. You just want it to stop!
The story begins with Margo (Margot Kidder) arriving in the middle of no where in Mexico to see her father...for the first time in many, many years. Apparently, Delbert (Burt Lancaster) deserted his wife and daughter long ago. Now he wants to make up with her, though it's seriously a case of too little, too late. During his delirious ravings, he tells Margo that he was involved in a bank robbery and gives her cryptic ideas where it was hidden up in New Mexico. Later, Margo and a sap she's glomped onto (Ted Danson) go in search of this relatively small fortune.
The problem with this film is simple...you don't like nor care about any of the people. They are trashy, ugly folks and whether or not they succeed in the end, they'll still be awful people. As a result, you just don't care about some screwed up stripper and her newest boyfriend. It's all very boring as well as a HUGE misfire.