Execution sales of land shall be held at the courthouse door designated in the notice of sale. If the land is located in only one county the sale of the land shall be held in that county. If the lands are located in more than one county but are contiguous the sale of the land shall be held in any county where any part of the land is located. If the land is located in more than one county but in separate tracts, the sale or sales shall be held in the county or counties in which any of the land is located which the court designates.