Exhibit 10.10

                                 PROMISSORY NOTE


$5,000,000.00                                                  September 5, 2001
                                                                  Miami, Florida

         FOR VALUE RECEIVED, Manuel D. Medina, a resident of Miami-Dade County,
Florida (the "Borrower") hereby promises to pay to the order of Terremark
Worldwide, Inc., a Delaware corporation (the "Lender") at 2601 South Bayshore
Drive, Miami, Florida 33133, or such other address as the Lender shall provide
by notice in writing to the Borrower, the principal amount of Five Million
Dollars ($5,000,000.00) in lawful money of the United States of America and in
immediately available funds within 90 days after the date the Borrower's
personal guarantees of the Lender's debt to Ocean Bank are terminated for any
reason (the "Maturity Date").

         At the option of the Lender, all sums advanced hereunder shall become
immediately due and payable, without notice or demand, upon the occurrence of
any one or more of the following events of default: the death of, insolvency of,
business failure of, appointment of a receiver for any part of the property or
assignment for the benefit of creditors by, or the commencement of any
proceedings under any bankruptcy or insolvency laws, by or against, the
Borrower.

         No delay or omission on the part of the Lender in the exercise of any
right hereunder shall operate as a waiver of such right or of any such other
right under this Promissory Note. A waiver by the Lender of any right or remedy
conferred to him hereunder on any one occasion shall not be construed as bar to,
or waiver of, any such right or remedy as to any future occasion.

         If this Promissory Note becomes in default and is placed in the hands
of an attorney, the Borrower agrees to pay all the costs, charges and expenses
incurred by the Lender in the enforcement of his rights hereunder including, but
not limited to, reasonable attorneys' fees.

         If this Promissory Note becomes in default, the Lender may offset, and
apply towards the repayment of all sums due under this Note, all monies, credits
or other property of any nature whatsoever (and the proceeds thereof) of the
Borrower, now or at any time hereafter in the possession of the Lender.

         The Borrower and all persons now or hereafter becoming obligated or
liable for the payment of this Promissory Note do jointly and severally waive
demand, notice of nonpayment, protest, notice of dishonor and presentment.

         This Promissory Note may be prepaid in whole or in part without a
prepayment penalty.

         This Promissory Note shall be construed in enforced according to the
laws of the State of Florida, including all principles of choice of laws,
conflict of laws or comity.





                                       /s/ MANUEL D. MEDINA
                                       -----------------------------------------
                                       Manuel D. Medina