EXHIBIT 2.1

         Amendment,  dated as of February 26, 1999, by and among  American Tower
Corporation,  a Delaware corporation ("ATC"),  American Towers, Inc., a Delaware
corporation  ("ATI"), ATC Merger Corporation,  a Delaware corporation  ("ATMC"),
and TeleCom Towers, L.L.C., a Delaware limited liability company ("TCT"), to the
Amended and  Restated  Agreement  and Plan of Merger,  dated as of December  18,
1998, as further amended by the Amendment,  dated as of December 23, 1998 (as so
amended, the "Merger Agreement"), by and among ATC, ATI, ATMC and TCT.

                              W I T N E S S E T H:

         WHEREAS,  ATC,  ATI  and  TCT  are  parties  to the  Merger  Agreement,
providing  for the merger of ATMC with and into TCT on the terms and  conditions
set forth therein; and

         WHEREAS, ATC, ATI, ATMC and TCT desire to amend the Merger Agreement in
certain respects; and

         WHEREAS,  the  Boards  of  Directors  of  ATC,  ATI  and  ATMC  and the
Management  Committee of TCT and the TCT Members have heretofore  authorized the
officers of such companies to enter into amendments to the Merger Agreement;

         NOW,   THEREFORE,   in   consideration   of  the   premises   and   the
representations, warranties, covenants and agreements herein contained and other
valuable   consideration,   the   receipt  and   adequacy   whereof  are  hereby
acknowledged,  the  parties  hereto  hereby,  intending  to  be  legally  bound,
represent, warrant, covenant and agree as follows:

1.       DEFINED TERMS

         As used  herein,  unless  the  context  otherwise  requires,  the terms
defined  in  Appendix  A to the  Merger  Agreement  when used in this  Amendment
without definition shall have the respective  meanings set forth therein.  Terms
defined in the singular shall have a comparable meaning when used in the plural,
and vice versa,  and the  reference to any gender shall be deemed to include all
genders.  Unless otherwise  defined or the context  otherwise  clearly requires,
terms for which  meanings  are  provided in this  Amendment or Appendix A to the
Merger Agreement shall have such meanings when used in each Collateral  Document
executed  or required to be  executed  pursuant  hereto or thereto or  otherwise
delivered,  from  time to  time,  pursuant  hereto  or  thereto.  References  to
"hereof," "herein" or similar terms are intended to refer to this Amendment as a
whole and not a particular  section,  and  references to "this Section" or "this
Article"  are  intended  to refer to the entire  section  or  article  and not a
particular subsection thereof. The term "either party" shall, unless the context
otherwise requires, refer to ATC, ATI and ATMC, on the one hand, and TCT, on the
other hand.

2.       THE AMENDMENTS

                  (a)  Limitation  of  Liability.  Section  9.3(a) of the Merger
         Agreement shall be amended to read in its entirety as follows:

                  Notwithstanding  the  provisions  of  Section  9.2,  after the
                  Closing, the ATC Indemnified Parties, on the one hand, and the
                  TCT Members,  on the other hand,  shall be entitled to recover
                  their Loss and Expense in respect of any Claim only (i) in the
                  event  that the  aggregate  Loss and  Expense  for all  Claims
                  exceed,  in the aggregate,  $500,000 (except to the extent any
                  such Claim  relates to the  Nonassigned  TCT Assets,  to which
                  such $500,000  threshold shall not apply),  in which event the
                  indemnified  party  shall be entitled to recover all such Loss
                  and Expense  including such $500,000;  (ii) to the extent that
                  the aggregate Loss



                  and Expense for all Claims do not exceed $5,000,000; and (iii)
                  an  additional  $225,000 in cash shall be placed in a separate
                  escrow pursuant to Section 3 of the Indemnity Escrow Agreement
                  to  satisfy  any  Claims  related  to the Mt.  Potosi,  Nevada
                  broadcast communications site (the "Mt. Potosi Escrow").

                  (b)  Appendix  A.  Appendix A is amended to add the  following
         definitions in their appropriate alphabetical order:

                  "Nonassigned   TCT   Assets"   shall   mean   any   agreement,
arrangement, commitment, contract, indemnity, undertaking or other obligation or
liability to which "TeleCom Towers, Inc." or "Telecom Towers, Inc." is party, as
set forth in the TCT Disclosure  Schedule,  including  without  limitation those
related to the Mt. Potosi, Nevada broadcast communications site.

         "Mt.  Potosi  Escrow"  shall  have the  meaning  given to it in Section
9.3(a).


3.       GENERAL PROVISIONS


                  (a)  No  Other   Changes  in  Merger   Agreement.   Except  as
         specifically  amended by this  Amendment,  the Merger  Agreement  shall
         remain in full  force and effect and shall not  otherwise  be  amended,
         modified or changed by this Amendment.

                  (b)  Incorporation  by Reference.  The  provisions of Sections
         10.1 through 10.13,  both inclusive,  of the Merger  Agreement shall be
         deemed  incorporated herein by reference with the same force and effect
         as though set forth hereat in their entirety, except that any reference
         to the term "this Agreement" in any such  incorporated  provision shall
         be deemed to refer to this Amendment.

                  (c) References. Any reference to the "Merger Agreement" in any
         of the  Collateral  Documents,  or in  any  certificate,  agreement  or
         instrument  delivered  in  connection  with  the  consummation  of  the
         transactions  contemplated  by the Merger  Agreement shall be deemed to
         refer to the Merger Agreement, as amended hereby.


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         IN WITNESS WHEREOF,  the parties have executed this Amendment or caused
this  Amendment  to be  executed by their  respective  officers  thereunto  duly
authorized as of the date first written above.

                             American Tower Corporation
                           
                           
                             By:  __________________________________________
                                  Name: James S. Eisenstein
                                  Title: Executive Vice President--Corporate
                                         Development
                           
                           
                             ATC Merger Corporation
                           
                           
                             By:  __________________________________________
                                  Name: James S. Eisenstein
                                  Title: Executive Vice President--Corporate
                                         Development
                           
                           
                             American Towers, Inc.
                           
                           
                             By:  __________________________________________
                                  Name: James S. Eisenstein
                                  Title: Executive Vice President--Corporate
                                         Development
                           
                           
                             TeleCom Towers, L.L.C.
                           
                           
                              By:__________________________________________
                                 Name: Randall N. Smith
                                 Title: Chairman & CEO
                           
                       


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