The title compound, C(10)H(16)O(3), with a bicyclo-[3.1.1]heptane unit, was obtained by oxidation of β-pinene. The asymmetric unit contains two independent mol-ecules with similar geometry: the six-membered rings in both mol-ecules adopt envelope conformations. In the crystal, the independent mol-ecules exist as O-H⋯O hydrogen-bonded dimers. The dimers are linked into helical chains along the b axis by O-H⋯O hydrogen bonds.