EXHIBIT 2.2

         Amendment,  dated as of December 23, 1998, 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, 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 an  Amended  and  Restated
Agreement  and Plan of  Merger,  dated as of  December  18,  1998  (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)  Conversion  of TCT  Units.  Section  3.1  of  the  Merger
         Agreement shall be amended as follows:

                           (i)  The  title  shall  be  amended  to  read  in its
                  entirety as follows:  "Conversion of ATMC Common Stock and TCT
                  Units";

                           (ii) The last sentence of the first  paragraph  shall
                  be amended to delete the last word,  "paragraph" and insert in
                  its place the words "two paragraphs"; and


                           (iii) The following  paragraph  shall be added as the
                  penultimate paragraph of Section 3.1:

                                    In the event the Monthly  Tower  Revenue Run
                           Rate of TCT for the month ended  immediately prior to
                           the  Closing  Date  shall have been less than the TCT
                           Target  Monthly Tower Revenue Run Rate, the ATC Stock
                           Consideration  shall be reduced by a number of shares
                           of ATC Common Stock  determined  as follows:  (i) the
                           difference  between the actual  Monthly Tower Revenue
                           Run  Rate of TCT and the  TCT  Target  Monthly  Tower
                           Revenue Run Rate shall be  determined  (the  "Revenue
                           Shortfall");  (ii)  the  Revenue  Shortfall  shall be
                           multiplied  by twelve  (12),  and the result shall be
                           multiplied by fourteen and  eight-tenths  (14.8) (the
                           "Enterprise   Value   Shortfall");   and   (iii)  the
                           Enterprise  Value  Shortfall  shall be divided by the
                           Closing Date Share Price; provided,  however, that in
                           no event  shall the  number  of shares of ATC  Common
                           Stock  to be  delivered  as  part  of the  ATC  Stock
                           Consideration  be reduced by more than 600,000 shares
                           of ATC Common  Stock.  The term "TCT  Target  Monthly
                           Tower  Revenue  Run Rate"  shall  mean the amount set
                           forth  opposite the month in which the Closing  shall
                           occur:

                               Month in which                  TCT Target
                               Closing Occurs               Revenue Run Rate
                               --------------               ----------------

                                     January                    $1,008,179
                                     February                   $1,022,862
                                     March                      $1,037,544
                                     April                      $1,052,226
                                     May                        $1,067,132
                                     June                       $1,079,143
                                     July and thereafter        $1,091,378

                           In the event that the Closing  shall occur after June
                           1999, the Monthly Tower Revenue Run Rate of TCT shall
                           be determined exclusively on the basis of its Monthly
                           Tower  Revenue Run Rate as of June 30,  1999,  and no
                           adjustment  to the ATC Stock  Consideration  shall be
                           made under this  Section 3.1 on account of the amount
                           of TCT's  Monthly Tower Revenue Run Rate as of a date
                           later than June 30, 1999.

                           Anything   in   this    Section   to   the   contrary
                           notwithstanding,  the parties shall have the right to
                           terminate  this  Agreement  in  accordance  with  the
                           provisions of Section 8.1(b) and Section  8.1(c),  as
                           applicable.

                  (b)  Conditions to Obligations of ATC and ATMC. The provisions
         of Section  7.2(o) are deleted in their  entirety and the section shall
         be designated with the term "Intentionally Omitted".

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

                           Enterprise  Value  Shortfall  shall have the  meaning
                  given to it in Section 3.1.

                           Revenue  Shortfall shall have the meaning given to it
                  in Section 3.1.

                           TCT Target  Monthly Tower Revenue Run Rate shall have
                  the meaning given to it in Section 3.1.

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                  (d) TCT Disclosure  Schedule.  Sections 4.11(a) and 6.6 of the
         TCT Disclosure Schedule shall be deemed to have been amended to reflect
         the fact that TCT may  change  its stay  bonus  program  to award up to
         $500,000  exclusively  to sales persons in relation to their  obtaining
         additional revenue-generating leases and contracts.


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.


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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:
                                           Title:



                                   ATC Merger Corporation


                                   By:  ____________________________________
                                           Name:
                                           Title:


                                   American Towers, Inc.


                                   By:______________________________________
                                         Name:
                                         Title:


                                   TeleCom Towers, L.L.C.


                                   By:______________________________________
                                        Name:
                                        Title:




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