Karst
A caver's field guide to the wild and show caves of south-central Indiana's karst country — built with conservation and location privacy at its core.
Free · works on your phone · create a free account
Explore what Karst does
Breadcrumbing
Record a trail through a cave; the next caver follows your footsteps in augmented reality. Earn XP, levels and badges as you map and follow routes.
Learn more CommunityGrottos & groups
Verified caving clubs get a private feed, photo gallery, member directory and trip-planning events.
Learn more ConservationPrivacy-first map
Sensitive wild caves show as broad areas — the exact entrance is never stored. Public caves get real pins.
Learn more Every caveThe field guide
Difficulty, length, hazards, gear, access — plus photos, condition reports, comments and a private trip log.
Learn moreWhy make an account?
Browsing is free and open. A free account (just your phone number) adds:
- Record & follow AR trails and climb the caver leaderboard
- Saved caves & grottos synced across your devices
- Comment and report conditions on caves with tips & current status
- Add photos to a cave's gallery (location data stripped automatically)
- Join a grotto to unlock member-only cave locations
- Plan & join trips through your grotto's events
Take Karst underground
Install the Android app or add Karst to your home screen — it works offline, so recording a breadcrumb trail keeps going even with no signal.