The biggest & longest caves in Indiana haven't been found yet!
Harrison Spring is Indiana's largest spring
Cave associated with Orangeville Rise -
Indiana's second largest spring - Huge drainage area!
Cave associated with Avoca Spring - Huge sinkhole drainage area.
Cave associated with Big Spring -Puts out A LOT of water.
Lost River Cave System:
-Part of the Lost River Cave System has been found
-There's miles of undiscovered passage though here