The southern Part of Arkansas belongs to the Gulf Coastal Plains, the eastern side are the flood plains of the Mississippi river.
Such lowlands have no caves or mines.
But there are two areas of interest, the north-west corner of the state which belongs to the Ozarks is karstified and has many caves.
As most of the Ozarks belongs to
Missouri,
see this page for more information about the Ozarks.
And the area west of Little Rock is hill country composed of crystalline rocks.
The area is an important producer of minerals and gems, mostly quartz, but also other gems including diamonds.
There are numerous mines, most of the fee mining type.
Alum Cove Natural Bridge Recreation Area
Beckham Creek Cave Haven
Blanchard Springs Caverns
Blue Springs
Board Camp Crystal Mine
Buffalo National River
Bull Shoals Caverns
Cosmic Caverns
Crater of Diamonds State Park
Devil’s Den Cave
Eureka Springs Underground
Glory Hole Waterfall
Hurricane River Cave
Coleman Rock Shop & Crystal Mines
Mammoth Spring
Mystic Caverns
Natural Bridge of Arkansas
Old Spanish Treasure Cave
Onyx Cave Park
Pivot Rock Park
Ron Coleman Mining
Stanley Mine on Fisher Mountain
Sweet Surrender Crystal Mine
Twin Creek Crystal Mine
War Eagle Cavern
Wegner Crystal Mines
Arkansas - Wikipedia
U.S. Show Caves Directory: Arkansas
5 Caves to Explore in Arkansas (visited: 18-MAR-2022)
Caves, Caverns, Spelunking (visited: 18-MAR-2022)
The Coolest Caving Experiences in the US Can be Found in Arkansas (visited: 18-MAR-2022)
7 Wonderful Caves in Arkansas to Visit and Explore (visited: 18-MAR-2022)