I have buried the DeLorean in the abandoned Delgado Mine adjacent to the old Boot Hill Cemetery as shown on the enclosed map.
8 seconds sound clip from the Back to the Future Part III movie soundboard.
You can hear this line at 00:08:19.716 in the DVD version of the movie.
Quote context
[...]
- However, I've gotten quite adept at shoeing horses and fixing wagons.
- 1885! Amazing! I actually end up as a blacksmith in the Old West.
- Hopefully, it should remain undisturbed, and preserved until you uncover it in 1955.
- Inside, you will find repair instructions.
- Once you have returned to 1985, destroy the time machine. Destroy it?
- Yeah. Well, it's a long story, Doc.
[...]