Via the spectral shift method, it is shown that the molecules of phenanthrene, fluorene, and naphthalene solubilized by Triton X-100 micelles are localized at the boundary between hydrophobic and hydrophilic regions of a micelle. Changes in the volumes of the cavities in the micelles containing the aforementioned aromatic hydrocarbons are estimated in comparison with the volumes of corresponding cavities in benzene and n-paraffins.