SkullCave Saver Mod adds an interesting feature to the game which can save your progress in the skull cave every X floors (X is configurable). When you return, it will warp you to your last saved level.
You can read using and install SkullCave Saver Mod in readme.txt in file download.
UPDATED for Stardew Valley 1.1
SkullCave-Saver-Mod.zip (1234 downloads) For SDV 1.0, SDV 1.1
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