Private tours of Mainz Underworlds in English, French and Spanish on a date of your choice.

All underworld tours cancelled until further notice due to Corona virus.

Discover the baroque barrel vault inside Fort Josef’s casemates, counter mining galleries, and more historical facilities!

From 1710 to 1730, the second ring of defence was built by the Mainz Elector to protect the City of Mainz from foreign attacks. The second ring of defence comprises Fort Josef and four other fortresses. After being more than 150 years the best in military technology, the new inventions of the late 19th century rendered Mainz fortification useless. As a result, the fortifications were demolished. The most underground galleries and casemates on the other hand survived and remained under newly built homes. In 1943, the old underground facilities of Fort Josef were excavated and converted into a civil air-raid shelter during WW2.

The tour includes a 3D-description of the fortress itself and also highlights the historical evolution of the “Fortress Mainz” over nearly 2000 years . Our presentations include maps, graphic arts, 3D-models and also a variety of historic films not to be seen on TV..

For further details, please don’t hesitate to ask us via E-Mail.

Air temperature inside the fortress range from 12-14 °C over the year. Unfortunately the facilities are not accessable for people in wheel chairs.

English Guided Tour:         200€ fixed charges up to 20 visitors; plus 10€ per additional entrant.              (maximum group size 40 visitors).

French Guided Tour:         240€ (max. 20 persons)

Tours in Spanish and „candlelight illumination“ (+ 150€) on request.

Mixed tours with german visitors possible. Max. group size up to 40 visitors.

All tours are on your own risk. We and the city of Mainz don’t take any responsibility or liability for any damage to you and your belongings.

Directions to Fort Josef in Mainz, 500m from Mainz Central station: