The National Speleological Society does more than any other organization to study, explore, and conserve cave and karst resources; protect access to caves; encourage responsible management of caves and their unique environments; and promote responsible caving.
The National Speleological Society is a non-profit, tax exempt organization under the provisions of the Internal Revenue Code. Donations to the Society may therefore be deducted from an individual's Federal Income Tax. The Society's Federal I.D. number is 54-6026867.