Museum: Adults USD 2.50, Children (6-12) USD 1.50, Family (2+*) USD 9. 
|Address:||Mammoth Spring State Park, P.O. Box 36, Mammoth Spring, AR 72554, Tel: +1-870-625-7364, Fax: +1-870-625-3255. E-mail:|
|As far as we know this information was accurate when it was published (see years in brackets), but may have changed since then.
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Mammoth Spring is the largest spring of Arkansans. The production is 37 Million litres per hour. It forms a huge lake with an size of four hectar. Right at the spring the water is used to produce hydroelectric power.