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):
                      January 27, 1999 (November 16, 1998)



                           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 7.  Financial Statements and Exhibits.

This report is being filed with respect to the following acquisitions:

(1)      On November 16, 1998,  American  Tower  Corporation  (the  "Company" or
         "ATC")  entered into an Agreement  and Plan of Merger ("the Omni Merger
         Agreement") with OmniAmerica,  Inc., a Delaware  corporation  ("Omni"),
         and  American  Towers,  Inc., a wholly  owned  subsidiary  of ATC and a
         Delaware  corporation  ("ATI"),  pursuant to which Omni will merge with
         and into ATI, which will be the surviving corporation.

(2)      On November 16, 1998,  ATC entered into an Agreement and Plan of Merger
         (the  "TeleCom  Merger  Agreement")  with  TeleCom  Towers,  L.L.C.,  a
         Delaware limited  liability company  ("TeleCom"),  and ATI, pursuant to
         which TeleCom will merge with and into ATI, which will be the surviving
         corporation.  On December  18,  1998,  ATC entered  into an Amended and
         Restated Agreement and Plan of Merger (the "TeleCom Amended Agreement")
         with  TeleCom,  ATI,  and  ATC  Merger  Corporation,   a  wholly  owned
         subsidiary  of ATI and a Delaware  corporation  ("ATMC"),  pursuant  to
         which  ATMC  will  merge  with  and  into  TeleCom,  which  will be the
         surviving entity.  The TeleCom Amended Agreement was further amended on
         December 23, 1998 by the  Amendment  (the  "Amendment")  to the TeleCom
         Amended Agreement with TeleCom, ATI, and ATMC.

     The Omni Merger  Agreement and the TeleCom Merger Agreement were filed with
     and  described  in the  Current  Report on Form 8-K filed by the Company on
     November 30, 1998.  The TeleCom  Amended  Agreement and the Amendment  were
     filed with and  described  in the  Current  Report on Form 8-K filed by the
     Company on January 8, 1999.  The  Company  did not  provide  audited or pro
     forma  financial  information  in either  filing and has not provided  such
     financial  information  herewith as the Company has previously reported the
     required information as set forth below.

(a)      Financial Statements of business acquired.

Pursuant to Regulation  240.15d-11,  the Company  satisfied the  requirements of
Form 8-K,  that  require  it to provide  financial  statements  for the  periods
specified in Regulation 210.3.05,  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 such
date.

The financial  statements of Omni and TeleCom were provided in the  Registration
Statements on Form S-4 as follows:

         OmniAmerica, Inc. and Subsidiaries

         Reports of Independent Auditors
         Consolidated Balance Sheets as of June 30, 1997 and 1998 and 
         September 30,1998  (unaudited)  
         Consolidated  Statements of Earnings for the years ended June 30, 1996,
         1997  and 1998 and  three  months  ended  September  30,  1997 and 1998
         (unaudited)
         Consolidated  Statements  of  Stockholders'  Equity for the years ended
         June 30, 1996,  1997 and 1998 and three months ended September 30, 1998
         (unaudited)
         Consolidated  Statements  of Cash  Flows for the years  ended  June 30,
         1996,  1997 and 1998 and three months ended September 30, 1997 and 1998
         (unaudited)
         Notes to Consolidated Financial Statements



         TeleCom Towers, L.L.C.

         Report of Independent Auditors
         Balance Sheets as December 31, 1997 and September 30, 1998 (unaudited)
         Statements  of  Operations  for the  period  from  September  30,  1997
         (inception)  to December 31, 1997 and nine months ended  September  30,
         1998  (unaudited)   
         Statements  of  Members'  Equity for period  from  September  30,  1997
         (inception)  to December 31, 1997 and nine months ended  September  30,
         1998 (unaudited)
         Statements  of Cash  Flows  for the  period  from  September  30,  1997
         (inception)  to December 31, 1997 and nine months ended  September  30,
         1998 (unaudited)
         Notes to Financial Statements


         Telecom Southwest Towers Limited Partnership

         Reports of Independent Auditors
         Balance  Sheets  as  December  31,  1996 and  1997  and  July 31,  1998
         (unaudited)
         Statements of Operations  for the years ended  December 31, 1995,  1996
         and 1997 and seven  months  ended  July 31,  1997 and 1998  (unaudited)
         Statements of Partner's  Capital for the years ended December 31, 1995,
         1996  and  1997 and  seven  months  ended  July  31,  1998  (unaudited)
         Statements  of Cash Flows for the years ended  December 31, 1995,  1996
         and 1997 and seven  months  ended  July 31,  1997 and 1998  (unaudited)
         Notes to Financial Statements


         Telecom Towers Mid-Atlantic Limited Partnership

         Reports of Independent Auditors
         Consolidated Balance Sheets as December 31, 1996 and 1997, and July 31,
         1998  (unaudited)  
         Consolidated  Statements of Operations for the years ended December 31,
         1995,  1996 and 1997 and  seven  months  ended  July 31,  1997 and 1998
         (unaudited)
         Consolidated  Statements  of  Partner's  Capital  for the  years  ended
         December 31,  1995,  1996 and 1997 and seven months ended July 31, 1998
         (unaudited)
         Consolidated  Statements of Cash Flows for the years ended December 31,
         1995,  1996 and 1997 and  seven  months  ended  July 31,  1997 and 1998
         (unaudited)
         Notes to Consolidated Financial Statements


         Telecom Towers of the West, L.P.

         Reports of Independent Auditors
         Consolidated Balance Sheets as December 31, 1996 and 1997, and July 31,
         1998 (unaudited)  
         Consolidated  Statements of  Operations  for the period from August 31,
         1996 to December  31, 1996 and year ended  December  31, 1997 and seven
         months ended July 31, 1997 and 1998 (unaudited)         
         Consolidated  Statements  of  Partner's  Capital  for the  years  ended
         December  31,  1996 and 1997  and  seven  months  ended  July 31,  1998
         (unaudited)
         Consolidated  Statements  of Cash Flows for the period  from August 31,
         1996 to December  31, 1996 and year ended  December  31, 1997 and seven
         months ended July 31, 1997 and 1998 (unaudited)
         Notes to Consolidated Financial Statements




         (b)  Unaudited Pro Forma Financial Information.

         Pursuant  to   Regulation   240.15d-11,   the  Company   satisfied  the
         requirements  of  Form  8-K,  that  require  it to  provide  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 such
         date.

         The unaudited pro forma  condensed  consolidated  financial  statements
         were provided in the Registration Statements on Form S-4 as follows:

         Unaudited  Pro  Forma  Condensed   Consolidated  Balance  Sheet  as  of
         September  30,  1998   Unaudited  Pro  Forma   Condensed   Consolidated
         Statements of Operations  for the nine months ended  September 30, 1998
         and year ended December 31, 1997 Notes to Unaudited Pro Forma Condensed
         Consolidated Financial Statements

         (c)  Exhibits.

         Exhibit  2.1 - Agreement  and Plan of Merger,  dated as of November 16,
                        1998, by and among American Tower Corporation   ("ATC"),
                        American Towers, Inc., a Delaware Corporation  ("ATI"), 
                        and OmniAmerica, Inc. a Delaware corporation.*

         Exhibit  2.2 - Agreement  and Plan of Merger,  dated as of November 16,
                        1998, by and among ATC, ATI, and TeleCom Towers, L.L.C.,
                        aDelaware limited liability company ("TeleCom").**

         Exhibit  2.3 - Amended and Restated Agreement and Plan of Merger, dated
                        as of December 18, 1998, by and among  ATC, ATC  Merger
                        Corporation, a Delaware corporation ("ATMC'),  ATI  and
                        TeleCom.***

         Exhibit  2.4 - Amendment,  dated as of December 23, 1998,  by and among
                        ATC, ATMC, ATI and TeleCom.****


                  *        Filed as Exhibit 2.1 to the Company's  Current Report
                           on Form 8-K filed on November 30, 1998.

                  **       Filed as Exhibit 2.2 to the Company's  Current Report
                           on Form 8-K filed on November 30, 1998.

                  ***      Filed as Exhibit 2.1 to the Company's  Current Report
                           on Form 8-K filed on January 8, 1999.

                  ****     Filed as Exhibit 2.2 to the Company's  Current Report
                           on Form 8-K filed on January 8, 1999.





                                   SIGNATURES


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


                                           AMERICAN TOWER CORPORATION
                                           (Registrant)

Date:    January 27, 1999                  By: /s/ Justin D. Benincasa
                                               --------------------------
                                               Name: Justin D. Benincasa
                                               Title: Vice President and 
                                                      Corporate Controller