Ix-xmara Tyburn hija xmara f'Londra, li taħdem taħt l-art minn South Hampstead permezz tal-Park ta 'San Ġakbu biex tilħaq il-Xmara Thames minn Whitehall Stairs (ħdejn Downing Street u Thorney Street, bejn Tower Millbank u Thames House). M'għandux jiġi konfuż mat-Tyburn Brook li huwa tributarju tax-Xmara Westbourne li huwa t-Thames li jmiss tributarju lejn il-punent fuq il-bank tat-tramuntana. [Xmara Thames][Millbank Tower]