Exhibit 23 INDEPENDENT AUDITORS' CONSENT We consent to the incorporation by reference in Registration Statement Nos. 333-72927, 333-56331 and 333-51959 of American Tower Corporation and subsidiaries on Form S-8 of our report dated March 4, 1999, appearing in the Annual Report on Form 10-K of American Tower Corporation for the year ended December 31, 1998. DELOITTE & TOUCHE LLP Boston, Massachusetts March 19, 1999