Heini Klopfer Ski Jump, Ski flying hill in Oberstdorf, Germany

The Heini Klopfer Ski Jump is a flying hill in the Stillachtal valley near Oberstdorf. Its 72-metre concrete inrun tower, held only by rock anchors at the take-off table, is nicknamed the "leaning tower of Oberstdorf". The landing slope descends between concrete walls, and the hill has a K-point of 200 m and a hill size of 235 m.

Built in five months from July to 10 December 1949 on the initiative of Heini Klopfer, Sepp Weiler and Toni Brutscher, the wooden hill was tested on 2 February 1950: Klopfer flew 90 m, Weiler 115 m. A week of flying from 28 February to 5 March 1950 opened it officially. The wooden structure was blown up for safety before the 1973 Ski Flying World Championships, replaced by the 72 m concrete inrun tower still in use.

The hill is named after Heini Klopfer, the Oberstdorf architect and ski jumper who designed it and made the first test flight of 90 metres on 2 February 1950. Klopfer, who died in 1968 at the age of 50, drew up plans for around 250 ski jumps worldwide as the FIS jump expert. The Oberstdorfers also call the concrete tower the "crooked tower of Oberstdorf".

The tower holds an inclined elevator for up to eleven people with jump skis, plus a platform for one hundred people. Warm-up and wax rooms, toilets and a kiosk are inside the tower. The structure stands just outside Oberstdorf in the Stillachtal, close to the Freibergsee.

The jump tower is held in the mountain only at the level of the take-off table, with rock anchors, and locals call it the "leaning tower of Oberstdorf". Its architect was the Oberstdorf-born Claus-Peter Horle.