(1)    If the governing body of a county, city, town or village accepts a gift or dedication of land made on condition that the land be devoted to a special purpose, and the condition subsequently becomes impossible or impracticable, the governing body may by resolution or ordinance enacted by a two-thirds vote of its members-elect either to grant the land back to the donor or dedicator or the heirs of the donor or dedicator, or accept from the donor or dedicator or the heirs of the donor or dedicator, a grant relieving the county, city, town or village of the condition, pursuant to article XI, section 3a, of the constitution.

   (2)   

      (a)    If the donor or dedicator of land to a county, city, town or village or the heirs of the donor or dedicator are unknown or cannot be found, the resolution or ordinance described under sub. (1) may provide for the commencement of an action under this section for the purpose of relieving the county, city, town or village of the condition of the gift or dedication.

      (b)    Any action under this subsection shall be brought in a court of record in the manner provided in ch. 801. A lis pendens shall be filed or recorded as provided in s. 840.10 upon the commencement of the action. Service upon persons whose whereabouts are unknown may be made in the manner prescribed in s. 801.12.

      (c)    The court may render judgment in an action under this subsection relieving the county, city, town or village of the condition of the gift or dedication.