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):
                           June 4, 1998 (June 3, 1998)

                       AMERICAN TOWER SYSTEMS CORPORATION
             (Exact name of registrant as specified in its charter)

       Delaware                         333-46025            65-0598206
(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 5.  Other Events

      On June 3, 1998,  American  Tower Systems  Corporation  issued the press
release attached herewith as Exhibit 99.

Item 7.  Exhibits

         Press Release, dated June 3, 1998.......................  Exhibit 99



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                                   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 SYSTEMS
                                       CORPORATION
                                       (Registrant)


Date: June 4, 1998                   By: /s/ Justin D. Benincasa
                                           Name: Justin D. Benincasa
                                           Title: Vice President and 
                                                    Corporate Controller









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                                                                    EXHIBIT 99

FOR IMMEDIATE RELEASE                 Contact:  Joe Winn, Chief Financial
                                                Officer or Emily Farina,
                                                Director of Investor Relations
                                                Tel:  (617) 375-7500


               AMERICAN TOWER SYSTEMS ANNOUNCES COMMITMENT TO FUND
                TAX REIMBURSEMENT OBLIGATION TO CBS CORPORATION


Boston,  Massachusetts--June  3,  1998--American  Tower Systems  Corporation,  a
subsidiary of American Radio Systems  Corporation  (NYSE:AFM),  announced  today
that it has received a commitment  to fund its tax  reimbursement  obligation to
CBS Corporation pursuant to the pending merger with American Radio,  expected to
occur this week, currently estimated at between  approximately $305.0 and $330.0
million,  depending on applicable state tax rates. The tax  reimbursement  would
change by between approximately $20.5 and $22.5 million for each $1.00 change in
the "fair market value" of the American Tower common stock,  again  depending on
the applicable state tax rates.

American  Tower  stated  that it  intends  to sell a  sufficient  amount of such
preferred  stock to fund the tax  reimbursement  obligation  that relates to the
distribution  of the American  Tower common stock to the American Radio security
holders  and  certain  related   transactions.   Pursuant  to  the  CBS  merger,
stockholders  of American  Radio will  receive  $44.00 per share in cash and one
share of common stock of American  Tower for each share of American Radio common
stock owned by them. Upon  consummation  of the CBS merger,  American Radio will
become a subsidiary of CBS and American  Tower will be an  independent  publicly
owned  company  whose Class A Common  Stock will be traded on the New York Stock
Exchange under the symbol "AMT."

American  Tower is also  obligated  to make certain  closing date balance  sheet
adjustment  payments  to CBS,  based on the  working  capital and debt levels of
American  Radio at the time of the CBS  merger.  Although  it is unable to state
definitively  the amount of such  required  payments  because  of,  among  other
things,   the  uncertainty  of  recent   operating   results  and  cash  capital
expenditures of American Radio and the amount of merger expenses, American Tower
estimates such obligation to CBS will not be more than $85.0 million,  including
the related tax  reimbursement  obligation.  American Tower intends to fund such
obligation through bank borrowings.

Steve Dodge,  American's  Chairman & CEO, stated,  "While we appreciate investor
enthusiasm,  we are very  concerned  that the market is failing to understand or
adequately  consider the huge tax  liability  that the run up in our stock price
generates.  This is a potentially massive number that materially  diminishes the
company's ability to pursue productive growth opportunities going forward."






The tax reimbursement estimates described above are based on the assumption that
the "fair market value" of American  Radio's stock interest in American Tower at
the time of the CBS  merger  would be  equal to the $22 7/16 per  share  closing
price of the American  Tower Class A Common Stock in the over the counter market
on June 2, 1998, and on certain other assumptions and interpretations of various
applicable income tax rules, and are subject to change.

American  Tower has filed a registration  statement  under the Securities Act of
1933, as amended,  offering an aggregate of 23,619,871  shares of Class A Common
Stock,  of which  20,000,000  shares are to be sold on behalf of American Tower.
Proceeds of the company's  offering  will be used to redeem the preferred  stock
and to reduce bank borrowings.

American  Tower  is  a  leading  independent  owner  and  operator  of  wireless
communications  sites in the  United  States,  and,  giving  effect  to  pending
acquisitions,  including the merger with  American  Tower  Corporation  which is
expected to close shortly,  operates more than 1,800 towers in 44 states and the
District of Columbia.






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               116 Huntington Avenue, Boston, Massachusetts 02116
                        (617) 375-7500 FAX (617) 375-7575