Route: Platteklip Gorge (South Africa)

Affectionately known as "PK", Platteklip Gorge is Cape Town's most notorious climb. Consisting of multiple switchbacks that never seem to end, its arguable the steepest climb from which to gain the most vert in the shortest distance.

https://www.strava.com/segments/13034821

https://www.hikingproject.com/trail/7036743/platteklip-gorge