630 yards. Par 3.

YouTube link.

The "Extreme 19th" is a supplemental golf hole at the Legend Golf and Safari Resort in South Africa.  The tee - accessed by way of a helicopter ride - is at the top of a mountain, 430 meters above the green. 

Different sources cite a "time for the ball to land" between 20-30 seconds, which seems way excessive for a 430 meter fall, assuming 9.8 m/s/s applies in South Africa.  Top professionals have hang times of about 7 seconds on level ground, so this hole requires an additional 13-23 seconds.  Presumably terminal velocity and perhaps updraft air currents muddy the pure math.

The leaderboard for the hole currently shows 8 birdies and about 100 pars.

Via Neatorama.