SECURITIES AND EXCHANGE COMMISSION

                             Washington, D.C. 20549

                                    FORM 8-K/A
                               (Amendment No. 1)


                                 CURRENT REPORT

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

                Date of Report (Date of earliest event reported):
                       March 18, 1999 (February 25, 1999)

                           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.

On February  25,  1999,  American  Tower  Corporation  ("ATC" or the  "Company")
consummated  the  transactions  contemplated by the Agreement and Plan of Merger
(the "Omni  Merger  Agreement"),  by and among ATC,  American  Towers,  Inc.,  a
Delaware  corporation  ("ATI"),  and OmniAmerica,  Inc., a Delaware  corporation
("OmniAmerica"),  dated as of November 16, 1998, whereby  OmniAmerica was merged
(the "Omni  Merger") with and into ATI,  with ATI as the surviving  corporation.
Pursuant to the Omni Merger  Agreement,  the Company issued 16,750,554 shares of
Class A Common Stock of ATC and assumed  971,850  options to purchase  shares of
Class A Common Stock of ATC previously granted under Omni stock option plans. In
connection  with the Omni  Merger,  the  Company  paid off  approximately  $94.3
million of assumed debt from available cash balances.  Upon  consummation of the
Omni Merger,  Jack D. Furst, the Chairman of OmniAmerica and a Partner of Hicks,
Muse, Tate & Furst Incorporated,  OmniAmerica's largest shareholder, was elected
to the Board of Directors of ATC.

For more information,  see the ATC press release, dated February 25, 1999, which
is attached herewith as Exhibit 99.1.

On February 26, 1999,  ATC  consummated  the  transactions  contemplated  by the
Amended  and  Restated  Agreement  and  Plan  of  Merger  (the  "TeleCom  Merger
Agreement"),  by  and  among  ATC,  ATI,  ATC  Merger  Corporation,  a  Delaware
corporation ("ATMC"),  and TeleCom Towers,  L.L.C., a Delaware limited liability
company  ("TeleCom"),  dated as of December 18, 1998,  as amended as of December
23, 1998 and February 26, 1999,  whereby ATMC was merged (the "TeleCom  Merger")
with and into  TeleCom,  with TeleCom as the surviving  entity.  Pursuant to the
TeleCom Merger Agreement,  the Company issued 3,940,874 shares of Class A Common
Stock  of  ATC  and  paid  approximately  $60.1  million  in  cash  and  assumed
approximately  $48.4 million in debt, of which  approximately  $44.1 million was
paid off at closing from  available  cash  balances.  Upon  consummation  of the
TeleCom  Merger,  Dean H. Eisner,  Vice  President of Business  Development  and
Planning of Cox Enterprises, Inc., an affiliate of Cox Telecom Towers, Inc., the
principal member of TeleCom, was elected to the Board of Directors of ATC.

For more information,  see the ATC press release, dated February 26, 1999, which
is attached herewith as Exhibit 99.2.

Giving effect to the consummation of the Omni Merger and the TeleCom Merger, ATC
currently  operates  more than  3,200  towers in 44 states and the  District  of
Columbia.  Based in Boston,  the Company has a national  footprint with regional
hubs in Boston, Albuquerque, Atlanta, Chicago, Houston and San Francisco.


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

         (a)  Financial  Statements  of  Business  Acquired  and (b)  Pro  Forma
Financial Information.

         Pursuant to  Regulation  240.15d-11,  the Company filed a Form 8-K/A on
         January 27, 1999, indicating that it satisfied the requirements of Form
         8-K, which require the Company to provide financial  statements for the
         periods  specified  in  Regulation  210.3.05  and pro  forma  financial
         statements for the periods specified in Regulation 210.11.02 and 11.03,
         in  the  Company's  Registration  Statements  on  Form  S-4  (File  No.
         333-70683  and File No.  333-70685),  as filed on January  15, 1999 and
         declared  effective by the Securities  and Exchange  Commission on that
         date.

         (c) Exhibits.

         Exhibit 2.1  - Amendment to the Amended and Restated Agreement and
                        Plan of Merger, dated as of February 26, 1999, by
                        and among ATC, ATI, ATMC and Telecom.

         Exhibit 10.1 - Amended and Restated Registration Agreement, dated as of
                        February 25, 1999, among ATC and each of the Parties 
                        named therein.

         Exhibit 99.1 - Press Release of ATC, dated February 25, 1999.

         Exhibit 99.2 - Press Release of ATC, dated February 26, 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: March 18, 1999         By: /s/ Justin D. Benincasa
                                Name: Justin D. Benincasa
                                Title: Vice President and Corporate Controller