The Spring (1989)

The Spring is a 1989 independent movie, not available in video, about archaeologists Andy (Dack Rambo) and Matty (Gedde Watanabe), who discover a diary written by a member of Ponce de León's exploration party, which they believe can lead them to the Fountain of Youth. They go to Florida to retrace De León's steps, but the secret of their quest gets out and they are pursued by a millionaire with plans to make money from the spring and a voodoo acolyte hoping to find immortality. Andy's investigations bring him in contact with Dyanne (Shari Shattuck), an artist living near the search area, who seems to be holding back knowledge of the spring.

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