SECURITIES AND EXCHANGE COMMISSION

                             Washington, D.C. 20549

                                    FORM 8-K


                                 CURRENT REPORT

                     PURSUANT TO SECTION 13 OR 15(d) OF THE
                         SECURITIES EXCHANGE ACT OF 1934

                Date of Report (Date of earliest event reported):
                      December 15, 2000 (December 4, 2000)

                           AMERICAN TOWER CORPORATION
             (Exact name of registrant as specified in its charter)

        Delaware                      001-14195             65-0723837
(State or Other Jurisdiction         (Commission           (IRS Employer
      of Incorporation)              File Number)          Identification No.)




           116 Huntington Avenue
           Boston, Massachusetts                             02116
   (Address of Principal Executive Offices)               (Zip Code)



                                 (617) 375-7500
              (Registrant's telephone number, including area code)



Item 2.  Acquisition or Disposition of Assets.

The following information serves to update the status of the AT&T transaction as
previously  disclosed in the current reports on Form 8-K filed by American Tower
Corporation  (the "Company") on September 17, 1999,  January 31, 2000, March 14,
2000, April 13, 2000, June 12, 2000 and September 11, 2000:

On December 4, 2000,  the Company  acquired 12  additional  towers and paid cash
consideration of approximately  $0.5 million under the terms of the Purchase and
Sale  Agreement,  dated as of September 10, 1999, by and between the Company and
AT&T Corp. The Company financed the transaction through available cash on-hand.

Item 7.  Financial Statements, Pro Forma Financial Information and Exhibits.

         (c)  Exhibits.

         Exhibit 10.1   Purchase and Sale Agreement, dated as of September 10,
                        1999, by and between the Company and AT&T Corp., a
                        New York corporation.*

* Filed as  Exhibit  10.1 from the  Company's  Current  Report on Form 8-K dated
September 17, 1999.






                                   SIGNATURES


         Pursuant to the  requirements  of the Securities  Exchange Act of 1934,
the  Registrant  has duly  caused  this report to be signed on its behalf by the
undersigned hereunto duly authorized.


                                          AMERICAN TOWER CORPORATION
                                          (Registrant)


Date: December 15, 2000                   By: /s/ Justin D. Benincasa
                                              Name: Justin D. Benincasa
                                              Title: Senior Vice President
                                                     and Corporate Controller