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  • Gustav-Jacob-Cave



Longest passage cave of the Swabian Alb.
Beautiful view from the mountain spur above the cave and the ruin Hofen.
Experience untouched nature with all sences.
Pure fun and adventure.


Explore with us the wild, completely nature Gustav-Jacob Cave. With a length of 210 metres, the main cave forms the longest passage cave in the Swabian Alb. The cave meanders through a mountain spur below the ruin of Hofen Castle and was only discovered in 1936 by the two community worker Gustav Fetzer and Jakob Kazmaier.
Here children have a clear advantage, because the cave is quite low, almost always narrow. Therefoe, standing upright tend to be the exception for adults. A high fun and adventure factor is therefore guaranteed. In the cave we are impressed by real works of art made of stalactites and as soon as we are bent around a corner, the picture is already changing again.

A few dates at a glance:

Community of Grabenstetten, district of Reutlingen
210 meters
Air temperature:
10-12°C all year round
Beautiful stalactites and sinter formations
Only possible from 01 April to 30 September.

Tour course:
A few dates at a glance:
Meeting place:
Parking place Ruine Hofen on the outskirts of Grabenstetten
approx. ca. 210 meters
Duration of the tour:
approx. 2 hours

Duration:2 hours
Commences in:Grabenstetten, Germany

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