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):
                      January 8, 1999 (December 18, 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 2.  Acquisition or Disposition of Assets.

      On December 18, 1998,  American Tower Corporation (the "Company" or "ATC")
entered into an Amended and Restated  Agreement and Plan of Merger (the "TeleCom
Merger  Agreement") with TeleCom Towers,  L.C.C.,  a Delaware limited  liability
company ("TeleCom"), American Towers, Inc., a wholly owned subsidiary of ATC and
a Delaware  corporation  ("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  Merger").  The  TeleCom  Merger  Agreement  amended and  restated  the
Agreement  and Plan of Merger (the  "Original  Merger  Agreement"),  dated as of
November  16,  1998,  by and among  ATC,  TeleCom  and ATI,  to (i)  reduce  the
aggregate  consideration  of $155.0  million to $148.75  million,  (ii) provide,
among other things,  for the  distribution  to the TeleCom members of all issued
and outstanding  limited liability company equity interests in a new subsidiary,
TeleCom  Towers-Pacific,  L.L.C.  ("TTP"),  into which TeleCom  contributed  its
partnership  interest in Prime-Telecom  Communications Co., a California general
partnership  ("Prime"),  and  (iii)  provide  for the  merger  of ATMC,  a newly
organized  subsidiary  of ATI, with and into TeleCom which will be the surviving
entity.  Simultaneously with the execution of the TeleCom Merger Agreement,  ATC
and TTP entered into put-call  arrangements  pursuant to which ATI would acquire
TTP for $12.5 million in the event TTP were to acquire the other 50% interest in
Prime.

      For more information,  see the TeleCom Merger Agreement, which is attached
herewith as Exhibit 2.1, and the Original Merger  Agreement,  which was filed as
Exhibit 2.2 to ATC's Form 10-Q for the quarter ended September 30, 1998.

      On December 23, 1998, ATC entered into an Amendment (the  "Amendment")  to
the TeleCom  Merger  Agreement  with  TeleCom,  ATI, and ATMC,  providing  for a
reduction  in the  aggregate  number  of  shares  of ATC  Class A  Common  Stock
deliverable  as part of the ATC Stock  Consideration  to the extent that TeleCom
fails to  achieve  certain  growth in its  Monthly  Tower  Revenue  Run Rate (as
defined  in the  TeleCom  Merger  Agreement).  For  more  information,  see  the
Amendment, which is attached herewith as Exhibit 2.2.

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

         (c)  Exhibits

         Exhibit  2.1   -      Amended and Restated  Agreement and Plan of
                               Merger,  dated as of December  18,  1998,  by and
                               among American  Tower  Corporation  ("ATC"),  ATC
                               Merger   Corporation,   a  Delaware   corporation
                               ("ATMC"),   American  Towers,  Inc.,  a  Delaware
                               corporation ("ATI"), and TeleCom Towers,  L.L.C.,
                               a Delaware limited liability company ("TeleCom")
                               (Schedules and Exhibits omitted).

         Exhibit  2.2   -      Amendment, dated as of December 23, 1998, by and
                               among ATC, ATMC, ATI and TeleCom.










                                   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: January 8, 1999               By: /s/ Justin D. Benincasa 
                                        Name: Justin D. Benincasa
                                        Title: Vice President and 
                                               Corporate Controller