Conducting-polymer towers have been fabricated by a template-less method from homogeneous monomer solution using the scanning electrochemical microscope (SECM). The features of the topogaphy feedback mode of the SECM-in which the microelectrode is vibrated laterally (thin arrows in the Figure)-are described and the characterization of polypyrrole towers (illustrated on the front cover) detailed. Uses in biosensors are foreseen.