The centrepoint of the third terrace is formed by a basin, in the middle of which the Earth and fertility goddess Cybele rides on a lion. This goddess was a particular favourite in Baroque gardens, an allusion to her as queen of Nature and the world of flora and fauna.

Two concave-curving sets of steps lead to the so-called grotto. This wall fountain with three recesses is still kept in its original state, as it was in the days of Prince Eugene. Two sculptures in the outer recesses represent the rivers of the region, the Danube and the March.

A lavishly ornamental iron gate leads from the grotto onto the fourth garden level. It is an outstanding masterpiece of the art of forging, executed around 1730 by Christian Kremer and Johann Georg Oegg. It was shown at the 1895 World Exhibition in Antwerp as a prime example of home-grown handicraft.