The Extreme 19th is the highest (400 metres or 1,300 feet) and longest (361 metres or 395 yards) par three golf hole in the world, located at the Legend Golf & Safari Resort in the Entabeni Safari Conservatory, Limpopo Province, South Africa.

The hole was conceived by the property owners, Peet and Mart Cilliers, along with Graham Cooke of the UK, and David Riddle. 

The tee, located at the top of Hangklip Mountain, is accessed only via helicopter.

Because of its height, a tee shot takes almost 20 seconds to land. A spotter is given a rough direction via radio to look for the ball. The fairway is seeded with Cynodon grass, and has been landscaped to direct the ball towards the green, which has been shaped to resemble the continent of Africa. 

According to en.wikipedia