Document:

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                                                                   EXHIBIT 4(16)

                          SECOND SUPPLEMENTAL INDENTURE

     THIS SECOND SUPPLEMENTAL INDENTURE (this "Supplemental Indenture") is made
and entered into as of December 31, 2000 by and among MGM MIRAGE, a Delaware
corporation ("MGM MIRAGE"), as issuer, MGM GRAND HOTEL & CASINO MERGER SUB LLC,
a Nevada limited liability company (the "Successor Company"), as subsidiary
gurarantor and successor by merger to MGM GRAND HOTEL, INC., a Nevada
corporation (the "Merging Entity"), and The Bank of New York, as trustee ("the
"Trustee") under the Indenture (as defined below). Capitalized terms not defined
herein shall have the same meaning as those ascribed to them in the Indenture
(as defined below).

                                    RECITALS

     WHEREAS, MGM MIRAGE, certain of the subsidiaries of MGM MIRAGE, including
the Merging Entity, as subsidiary guarantors, and the Trustee entered into that
certain Indenture, dated as of May 31, 2000 (as amended and/or supplemented, the
"Indenture");

     WHEREAS, pursuant to that certain Articles of Merger, dated December 14,
2000, by and between the Successor Company and the Merging Entity, the Merging
Entity is being merged with and into the Successor Company on December 31, 2000
(the "Merger"), and immediately following the Merger, MGM MIRAGE will be the
sole member of the Successor Company;

     WHEREAS, the Successor Company, as the surviving entity in the Merger, has
taken all necessary limited liability company action to duly authorize the
execution and delivery of this Supplemental Indenture; and

     WHEREAS, the Successor Company is delivering to the Trustee, concurrently
herewith, the documents required by the Indenture in connection with the Merger
and this Supplemental Indenture;

     NOW, THEREFORE, in consideration of good and valuable consideration, the
receipt and sufficiency of which are hereby acknowledged, the parties agree, for
the benefit of each other and the holders of the Notes, as follows:

                                    ARTICLE I
                            ASSUMPTION OF OBLIGATIONS

     SECTION 1.01 The Successor Company hereby expressly assumes all of the
obligations of the Merging Entity under the Guarantee and the Indenture upon the
effectiveness of the Merger.

<PAGE>

                                   ARTICLE II
                             CONCERNING THE TRUSTEE

     SECTION 2.01 The Trustee hereby accepts the trusts hereby declared and
provided and agrees to perform the same upon the terms and conditions set forth
in the Indenture and in this Supplemental Indenture, including the terms and
provisions defining and limiting the liabilities in the performance of the trust
created by the Indenture, as supplemented by this Supplemental Indenture.

     SECTION 2.02 The Trustee shall not be responsible in any manner whatsoever
for or in respect of the validity or sufficiency of this Supplemental Indenture
or the due execution hereof by the Successor Company.

                                   ARTICLE III
                                  MISCELLANEOUS

     SECTION 3.01 Upon the execution and delivery of this Supplemental Indenture
by the Successor Company and the Trustee, the Indenture shall be supplemented in
accordance herewith, and this Supplemental Indenture shall form a part of the
Indenture for all purposes, and every holder of Notes heretofore or hereafter
authenticated and delivered under the Indenture shall be bound thereby.

     SECTION 3.02 The Trustee may place an appropriate notation about the
Supplemental Indenture on any Note authenticated after the execution and
delivery of this Supplemental Indenture. MGM MIRAGE may, in its sole discretion,
issue in exchange for all outstanding Notes, and the Trustee shall then
authenticate, new Notes that reflect the Supplemental Indenture.

     SECTION 3.03 Except as modified herein, the Indenture is in all respects
confirmed and preserved, and all provisions of the Indenture shall remain in
full force and effect.

     SECTION 3.04 This Supplemental Indenture may be executed in any number of
counterparts, and by the parties hereto in separate counterparts, each of which
when so executed shall be deemed to be an original and all of which taken
together shall constitute one and the same instrument.

     SECTION 3.05 This Supplemental Indenture shall be governed by and construed
in accordance with the internal laws of the State of Nevada, without regard to
the conflicts of laws rules thereof.

<PAGE>

         IN WITNESS WHEREOF, the parties hereto have caused this Supplemental
Indenture to be executed as of the day and year first above written.

                               MGM MIRAGE,
                               AS ISSUER

                               By: SCOTT LANGSNER
                                   ------------------------------------------
                                   Name:  Scott Langsner
                                   Title:  Secretary/Treasurer

                               MGM GRAND HOTEL & CASINO MERGER SUB
                          LLC, AS SUBSIDIARY GUARANTOR

                               By:  MGM MIRAGE

                                       By:  SCOTT LANGSNER
                                            ---------------------------------
                                            Name:    Scott Langsner
                                            Title:  Secretary/Treasurer

                               THE BANK OF NEW YORK,
                               AS TRUSTEE

                               By: STACEY POINDEXTER
                                   ------------------------------------------
                                   Name: Stacey Poindexter
                                   Title: Assistant Treasurer<PAGE>

                                                                   EXHIBIT 4(17)

                          SECOND SUPPLEMENTAL INDENTURE

     THIS SECOND SUPPLEMENTAL INDENTURE (this "Supplemental Indenture") is made
and entered into as of December 31, 2000 by and among MGM MIRAGE, a Delaware
corporation ("MGM MIRAGE"), as issuer, MGM GRAND HOTEL & CASINO MERGER SUB, LLC,
a Nevada limited liability company (the "Successor Company"), as subsidiary
guarantor and successor by merger to MGM GRAND HOTEL, INC., a Nevada corporation
(the "Merging Entity"), and U.S. Trust Company, National Association, as trustee
("the "Trustee") under the Indenture (as defined below). Capitalized terms not
defined herein shall have the same meaning as those ascribed to them in the
Indenture (as defined below).

                                    RECITALS

     WHEREAS, MGM MIRAGE, certain of the subsidiaries of MGM MIRAGE, including
the Merging Entity, as subsidiary guarantors, and the Trustee entered into that
certain Indenture, dated as of September 15, 2000 (as amended and/or
supplemented, the "Indenture");

     WHEREAS, pursuant to that certain Articles of Merger, dated December 14,
2000, by and between the Successor Company and the Merging Entity, the Merging
Entity is being merged with and into the Successor Company on December 31, 2000
(the "Merger"), and immediately following the Merger, MGM MIRAGE will be the
sole member of the Successor Company;

     WHEREAS, the Successor Company, as the surviving entity in the Merger, has
taken all necessary limited liability company action to duly authorize the
execution and delivery of this Supplemental Indenture; and

     WHEREAS, the Successor Company is delivering to the Trustee, concurrently
herewith, the documents required by the Indenture in connection with the Merger
and this Supplemental Indenture;

     NOW, THEREFORE, in consideration of good and valuable consideration, the
receipt and sufficiency of which are hereby acknowledged, the parties agree, for
the benefit of each other and the holders of the Notes, as follows:

                                    ARTICLE I
                            ASSUMPTION OF OBLIGATIONS

     SECTION 1.01 The Successor Company hereby expressly assumes all of the
obligations of the Merging Entity under the Guarantee and the Indenture upon the
effectiveness of the Merger.

                                   ARTICLE II
                             CONCERNING THE TRUSTEE

<PAGE>

     SECTION 2.01 The Trustee hereby accepts the trusts hereby declared and
provided and agrees to perform the same upon the terms and conditions set forth
in the Indenture and in this Supplemental Indenture, including the terms and
provisions defining and limiting the liabilities in the performance of the trust
created by the Indenture, as supplemented by this Supplemental Indenture.

     SECTION 2.02 The Trustee shall not be responsible in any manner whatsoever
for or in respect of the validity or sufficiency of this Supplemental Indenture
or the due execution hereof by the Successor Company.

                                   ARTICLE III
                                  MISCELLANEOUS

     SECTION 3.01 Upon the execution and delivery of this Supplemental Indenture
by the Successor Company and the Trustee, the Indenture shall be supplemented in
accordance herewith, and this Supplemental Indenture shall form a part of the
Indenture for all purposes, and every holder of Notes heretofore or hereafter
authenticated and delivered under the Indenture shall be bound thereby.

     SECTION 3.02 The Trustee may place an appropriate notation about the
Supplemental Indenture on any Note authenticated after the execution and
delivery of this Supplemental Indenture. MGM MIRAGE may, in its sole discretion,
issue in exchange for all outstanding Notes, and the Trustee shall then
authenticate, new Notes that reflect the Supplemental Indenture.

     SECTION 3.03 Except as modified herein, the Indenture is in all respects
confirmed and preserved, and all provisions of the Indenture shall remain in
full force and effect.

     SECTION 3.04 This Supplemental Indenture may be executed in any number of
counterparts, and by the parties hereto in separate counterparts, each of which
when so executed shall be deemed to be an original and all of which taken
together shall constitute one and the same instrument.

     SECTION 3.05 This Supplemental Indenture shall be governed by and construed
in accordance with the internal laws of the State of Nevada, without regard to
the conflicts of laws rules thereof.

<PAGE>

     IN WITNESS WHEREOF, the parties hereto have caused this Supplemental
Indenture to be executed as of the day and year first above written.

                               MGM MIRAGE,
                               AS ISSUER

                               By:  SCOTT LANGSNER
                                    --------------------------------------------
                                    Name:  Scott Langsner
                                    Title:  Secretary/Treasurer

                               MGM GRAND HOTEL & CASINO MERGER  SUB
                               LLC, AS SUBSIDIARY GUARANTOR

                               By: MGM MIRAGE

                                        By: SCOTT LANGSNER
                                            ------------------------------------
                                            Name:  Scott Langsner
                                            Title:  Secretary/Treasurer

                               U.S. TRUST COMPANY, NATIONAL ASSOCIATION,
                               AS TRUSTEE

                               By:  M. DEBORAH GIBBONS
                                    --------------------------------------------
                                    Name: M. Deborah Gibbons
                                    Title: Vice President

 :

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