At the end of the 1990s, the steel sculptor had the opportunity to purchase the site of the former Royal Bavarian Ironworks (first mentioned in documents in 1411) with an attached quarry made of Jurassic limestone in Obereichstätt. The artist and his wife Camilla bought the 23,000 square meter complex and restored the entire complex with its disused halls and buildings from the 1830s.

Here, Lechner realized his wish to present the metre-high steel sculptures in the open air. Rust-coated sculptures weighing tons now stand on terraced stone plateaus against the impressive backdrop of the rock face of the quarry. In 2013, an additional large exhibition hall for sculptures was opened on the site.

This building is the largest privately owned hall in Germany, whose ground strength is designed in such a way that it can support 100 tons of weight per square meter. This is a necessary prerequisite for making Lechner's sculptures tangible in the interior. Comparable conditions can only be found at the Tate Modern in London or at the Guggenheim Museum in Bilbao.

Alf Lechner was a virtuoso illustrator throughout his life. He left behind around 4,500 drawings and several printed portfolios. In order to be able to present his graphic work on the sculpture park area, a former cowshed and hayloft were transformed into the so-called paper house. Here, drawings from different phases of the artist's work are presented in regularly changing exhibitions.