Land Use & Property Rights
Caves, karst & Missouri quirks
Missouri is the Cave State, and the ground beneath the Ozarks does some surprising things. Owning the cave mouth isn't the same as owning the passage, the rock the cave is made of is protected by law, and what you pour into a sinkhole goes straight to the water you drink. Here's the plain-English version.
Who owns a cave?
The entrance and the passage aren't the same thing
Who owns a cave? Subsurface ownership CAN follow the surface title — but mineral severances, deeds, easements, surveys, and passages that cross property lines complicate it. Owning the entrance does NOT automatically give you the right to travel under a neighbor's land.
Missouri's cave-protection law
It's a crime to break or deface cave features
Missouri is the Cave State, and it protects caves: under RSMo 569.135 (moved here in 2014 — it used to be 578.210, so older sources cite 'Chapter 578'), without the prior WRITTEN permission of the owner, officer, lessee, or superintendent, it's a class A misdemeanor to break, deface, or remove cave formations, or to tamper with a cave gate, lock, or door (it doesn't apply to mining operations). Arrowheads, relics, and the serious rules around graves are covered in the Foraging hub.
Karst country
Never dump anything into a sinkhole
Much of the Ozarks is karst — caves, sinkholes, losing streams, and springs, where water moves fast through underground channels. NEVER dump anything into a sinkhole: it flows straight to the groundwater that wells and springs draw from. Sinkhole and drainage risk also affects where you can build and put a septic system, so buyers should ask about it.
Caves also turn up the older parts of land life — arrowheads, relics, and the serious rules around graves are covered in the Foraging hub.
When the ground sinks
Subsidence over old mines
Over old mines, ask about subsidence — see Minerals & the split estate.
The full story on who owns what's underground — and how to ask DNR about mapped mining history — is in minerals & the split estate.
A title quirk worth knowing
Old colonial-grant titles
And in the colonial-grant areas around Ste. Genevieve and the Mississippi, older titles can look unusual — another reason to use a title professional (see Deeds, title & boundaries).
More on reading what your title actually says is in deeds, title & boundaries.
Not legal advice
Missouri Porch explains the rules in plain words; your deed, your county, and the statutes are the final word — and for your situation, talk to a pro.
Last checked: 2026-06-18. Property law is nuanced, varies by county, and changes — so treat this as a plain-English starting point, not the final word. The authoritative answers are in your deed and the chain of title, your county's records, and the current statutes; for your situation, talk to a pro.
This is general information, not legal advice. Rules vary by county and change. Check your deed, your county's Recorder and Assessor, and the current statute — and for your situation, talk to a Missouri real estate attorney, a licensed land surveyor, or a title company.
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